diff --git a/backend/app/routes/plex.py b/backend/app/routes/plex.py
index 6101b2f..6b870e7 100644
--- a/backend/app/routes/plex.py
+++ b/backend/app/routes/plex.py
@@ -8,8 +8,8 @@ catalog sync.
 import logging
 
 from fastapi import APIRouter, Depends, HTTPException, Query, Response
-from sqlalchemy import func
-from sqlalchemy.orm import Session
+from sqlalchemy import and_, func, or_
+from sqlalchemy.orm import Session, aliased
 
 from app import sysconfig
 from app.auth import current_user
@@ -130,14 +130,15 @@ def browse(
     library: str,
     q: str | None = None,
     sort: str = "added",
+    show: str = "all",
     offset: int = 0,
     limit: int = Query(default=40, ge=1, le=100),
     user: User = Depends(current_user),
     db: Session = Depends(get_db),
 ) -> dict:
-    """List a library's movies (leaves) or shows, with optional FTS search + sorting.
-    Movie libraries return playable movie cards; show libraries return show cards (drill in via
-    /show/{id})."""
+    """List a library's movies (leaves) or shows, with optional FTS search + sorting + a per-user
+    watch-state filter (`show`: all|unwatched|in_progress|watched — movie libraries only). Movie
+    libraries return playable movie cards; show libraries return show cards (drill in via /show)."""
     lib = db.query(PlexLibrary).filter_by(plex_key=str(library)).first()
     if lib is None:
         raise HTTPException(status_code=404, detail="Unknown Plex library")
@@ -147,6 +148,17 @@ def browse(
     query = db.query(model)
     if lib.kind == "movie":
         query = query.filter(PlexItem.library_id == lib.id, PlexItem.kind == "movie")
+        # Per-user watch-state filter (movies only; a show isn't a single watch unit).
+        st = aliased(PlexState)
+        query = query.outerjoin(st, and_(st.item_id == PlexItem.id, st.user_id == user.id))
+        if show == "watched":
+            query = query.filter(st.status == "watched")
+        elif show == "in_progress":
+            query = query.filter(st.position_seconds > 0, or_(st.status.is_(None), st.status != "watched"))
+        elif show == "unwatched":
+            query = query.filter(or_(st.status.is_(None), st.status.notin_(["watched", "hidden"])))
+        else:  # all — hide only the explicitly hidden
+            query = query.filter(or_(st.status.is_(None), st.status != "hidden"))
     else:
         query = query.filter(PlexShow.library_id == lib.id)
 
diff --git a/frontend/src/App.tsx b/frontend/src/App.tsx
index 8171375..c441be1 100644
--- a/frontend/src/App.tsx
+++ b/frontend/src/App.tsx
@@ -63,6 +63,7 @@ import { CURRENT_VERSION } from "./lib/releaseNotes";
 // never reach non-admins. All are rendered inside a <Suspense> boundary below.
 const Feed = lazy(() => import("./components/Feed"));
 const PlexBrowse = lazy(() => import("./components/PlexBrowse"));
+const PlexSidebar = lazy(() => import("./components/PlexSidebar"));
 const ChannelPage = lazy(() => import("./components/ChannelPage"));
 const Channels = lazy(() => import("./components/Channels"));
 const Playlists = lazy(() => import("./components/Playlists"));
@@ -242,6 +243,10 @@ export default function App() {
   const [channelsViewRaw, setChannelsView] = useAccountPersistedState(LS.channelsView, "subscribed");
   const channelsView: ChannelsView =
     channelsViewRaw === "discovery" ? "discovery" : "subscribed";
+  // Plex module filters (its own left-sidebar filter section) — per-account persisted.
+  const [plexLib, setPlexLib] = useAccountPersistedState(LS.plexLibrary, "");
+  const [plexShowFilter, setPlexShowFilter] = useAccountPersistedState(LS.plexShow, "all");
+  const [plexSort, setPlexSort] = useAccountPersistedState(LS.plexSort, "added");
   // Bumped to tell the channel manager to drop a stale column filter when we send the user
   // there to see a specific set (the header's "without full history" link).
   const [channelsFilterReset, setChannelsFilterReset] = useState(0);
@@ -713,6 +718,20 @@ export default function App() {
           onToggleCollapse={() => setFilterCollapsed(!filterCollapsed)}
         />
       )}
+      {page === "plex" && meQuery.data!.plex_enabled && (
+        <Suspense fallback={null}>
+          <PlexSidebar
+            library={plexLib}
+            setLibrary={setPlexLib}
+            show={plexShowFilter}
+            setShow={setPlexShowFilter}
+            sort={plexSort}
+            setSort={setPlexSort}
+            collapsed={filterCollapsed}
+            onToggleCollapse={() => setFilterCollapsed(!filterCollapsed)}
+          />
+        </Suspense>
+      )}
       <div className="relative flex-1 min-w-0 flex flex-col">
         {channelView ? (
           <Suspense fallback={pageFallback}>
@@ -782,8 +801,8 @@ export default function App() {
               prefs={prefsCtl}
               onOpenWizard={() => setWizardOpen(true)}
             />
-          ) : meQuery.data!.plex_enabled && filters.librarySource === "plex" ? (
-            <PlexBrowse filters={filters} setFilters={setFilters} />
+          ) : page === "plex" && meQuery.data!.plex_enabled ? (
+            <PlexBrowse q={filters.q} library={plexLib} show={plexShowFilter} sort={plexSort} />
           ) : (
             <Feed
               filters={filters}
@@ -791,7 +810,6 @@ export default function App() {
               view={view}
               canRead={meQuery.data!.can_read}
               isDemo={meQuery.data!.is_demo}
-              plexEnabled={meQuery.data!.plex_enabled}
               onOpenWizard={() => setWizardOpen(true)}
               ytSearch={ytSearch}
               onYtSearch={enterYtSearch}
diff --git a/frontend/src/components/Feed.tsx b/frontend/src/components/Feed.tsx
index fce6e32..04a0ef5 100644
--- a/frontend/src/components/Feed.tsx
+++ b/frontend/src/components/Feed.tsx
@@ -74,7 +74,6 @@ export default function Feed({
   view,
   canRead,
   isDemo = false,
-  plexEnabled = false,
   onOpenWizard,
   ytSearch,
   onYtSearch,
@@ -87,8 +86,6 @@ export default function Feed({
   view: "grid" | "list";
   canRead: boolean;
   isDemo?: boolean;
-  // When the optional Plex module is on, offer "Plex" as a feed source (App swaps to PlexBrowse).
-  plexEnabled?: boolean;
   onOpenWizard: () => void;
   // Live YouTube search: the active search term (null = normal feed). Entering a search and
   // leaving it both step browser history (the search is a feed sub-view with its own history
@@ -563,7 +560,6 @@ export default function Feed({
                 <option value="organic">{t("feed.source.organic")}</option>
                 <option value="all">{t("feed.source.all")}</option>
                 <option value="search">{t("feed.source.only")}</option>
-                {plexEnabled && <option value="plex">{t("feed.source.plex")}</option>}
               </select>
             </label>
           </>
diff --git a/frontend/src/components/Header.tsx b/frontend/src/components/Header.tsx
index 2967d18..a5b93a4 100644
--- a/frontend/src/components/Header.tsx
+++ b/frontend/src/components/Header.tsx
@@ -26,10 +26,14 @@ export default function Header({
   const { t } = useTranslation();
   const canSearchYt = !me.is_demo;
   const trimmedQ = filters.q.trim();
+  // The search box serves both the YouTube feed and the Plex module (integrated search); the live
+  // YouTube-search escalation (Enter / button) is feed-only.
+  const isSearchPage = page === "feed" || page === "plex";
+  const isYtCapable = page === "feed" && canSearchYt;
 
   return (
     <header className="glass h-14 shrink-0 border-b border-border flex items-center gap-3 px-4 z-20">
-      {page === "feed" ? (
+      {isSearchPage ? (
         <div className="flex-1 max-w-xl mx-auto flex items-center gap-2">
           <div className="flex-1 relative">
             <Search className="w-4 h-4 absolute left-3 top-1/2 -translate-y-1/2 text-muted" />
@@ -40,15 +44,16 @@ export default function Header({
                 // When a search first appears, rank the feed by relevance — set atomically with
                 // the query (race-free vs. per-keystroke updates). Only overrides the default
                 // "newest" sort; a custom sort the user chose is left alone. Cleared in Feed.
-                const startSearch = !filters.q.trim() && !!q.trim() && filters.sort === "newest";
+                const startSearch =
+                  page === "feed" && !filters.q.trim() && !!q.trim() && filters.sort === "newest";
                 setFilters({ ...filters, q, ...(startSearch ? { sort: "relevance" } : {}) });
               }}
               onKeyDown={(e) => {
-                // Enter runs a live YouTube search for the typed term (the box itself filters
-                // the local catalog as you type; Enter escalates to the YouTube API).
-                if (e.key === "Enter" && trimmedQ && canSearchYt) onYtSearch(trimmedQ);
+                // On the feed, Enter escalates the typed term to a live YouTube search (the box
+                // itself filters the local catalog / Plex library as you type).
+                if (e.key === "Enter" && trimmedQ && isYtCapable) onYtSearch(trimmedQ);
               }}
-              placeholder={t("header.searchPlaceholder")}
+              placeholder={page === "plex" ? t("plex.searchPlaceholder") : t("header.searchPlaceholder")}
               className="w-full bg-card border border-border rounded-full pl-9 pr-9 py-2 text-sm outline-none focus:border-accent"
             />
             {filters.q && (
@@ -62,7 +67,7 @@ export default function Header({
               </button>
             )}
           </div>
-          {trimmedQ && canSearchYt && (
+          {trimmedQ && isYtCapable && (
             <button
               onClick={() => onYtSearch(trimmedQ)}
               title={t("header.searchYoutubeTip")}
diff --git a/frontend/src/components/NavSidebar.tsx b/frontend/src/components/NavSidebar.tsx
index 345ef3e..2634a61 100644
--- a/frontend/src/components/NavSidebar.tsx
+++ b/frontend/src/components/NavSidebar.tsx
@@ -8,6 +8,7 @@ import {
   Bell,
   ChevronLeft,
   ChevronRight,
+  Clapperboard,
   Download,
   Home,
   Info,
@@ -162,6 +163,8 @@ export default function NavSidebar({
     { page: "feed", icon: Home, label: t("header.account.feed") },
     { page: "channels", icon: Tv, label: t("header.account.channels") },
     { page: "playlists", icon: ListVideo, label: t("header.account.playlists") },
+    // Optional Plex module — browse/play your Plex library. Shown only when the admin enabled it.
+    ...(me.plex_enabled ? [{ page: "plex" as Page, icon: Clapperboard, label: t("plex.navLabel") }] : []),
     { page: "notifications", icon: Bell, label: t("inbox.navLabel"), badge: unread },
     // Direct messaging — its own module; hidden for the shared demo account.
     ...(me.is_demo
diff --git a/frontend/src/components/PlexBrowse.tsx b/frontend/src/components/PlexBrowse.tsx
index ff16521..854bb22 100644
--- a/frontend/src/components/PlexBrowse.tsx
+++ b/frontend/src/components/PlexBrowse.tsx
@@ -1,54 +1,40 @@
-import { useEffect, useMemo, useState } from "react";
+import { useEffect, useRef, type CSSProperties } from "react";
 import { useTranslation } from "react-i18next";
 import { useInfiniteQuery, useQuery } from "@tanstack/react-query";
-import { ArrowLeft, Film, Search, Tv2 } from "lucide-react";
-import { api, type FeedFilters, type PlexCard } from "../lib/api";
+import { ArrowLeft } from "lucide-react";
+import { api, type PlexCard } from "../lib/api";
 import { notify } from "../lib/notifications";
 import { useDebounced } from "../lib/useDebounced";
+import { useHistorySubview } from "../lib/history";
 
-// Plex mode of the feed: browse/search the mirrored Plex library as feed-style cards, drill from a
-// show into seasons/episodes. Rendered by App in place of <Feed> when filters.librarySource==="plex"
-// (so the video-feed hooks never run in Plex mode). Playback lands in P2 — for now a card just
-// announces it; shows drill down. Self-contained: its own library scope + search + sort + paging.
+// The Plex module's content area: browse/search the mirrored library as poster cards, drill from a
+// show into seasons/episodes. Library scope / watch-state / sort live in the left PlexSidebar; the
+// search term comes from the shared top Header search box (q). A show drill-down rides history
+// (useHistorySubview) so browser Back returns to the grid. Playback lands in P2 — a card announces
+// for now. Rendered by App for page==="plex" (its own nav module).
 
-type Props = {
-  filters: FeedFilters;
-  setFilters: (f: FeedFilters) => void;
-};
+type Props = { q: string; library: string; show: string; sort: string };
 
 const PAGE = 40;
 
-function secs(n?: number | null): string {
+function dur(n?: number | null): string {
   if (!n) return "";
   const h = Math.floor(n / 3600);
   const m = Math.floor((n % 3600) / 60);
   return h ? `${h}h ${m}m` : `${m}m`;
 }
 
-export default function PlexBrowse({ filters, setFilters }: Props) {
+export default function PlexBrowse({ q, library, show, sort }: Props) {
   const { t } = useTranslation();
-  const libsQ = useQuery({ queryKey: ["plex-libraries"], queryFn: api.plexLibraries });
-  const libs = useMemo(() => libsQ.data?.libraries ?? [], [libsQ.data]);
-
-  const [library, setLibrary] = useState<string | null>(null);
-  const [q, setQ] = useState("");
-  const [sort, setSort] = useState("added");
-  const [openShow, setOpenShow] = useState<string | null>(null);
   const dq = useDebounced(q.trim(), 350);
-
-  // Default to the first library once loaded.
-  useEffect(() => {
-    if (library === null && libs.length) setLibrary(libs[0].key);
-  }, [libs, library]);
-
-  const activeLib = libs.find((l) => l.key === library);
+  const sub = useHistorySubview<string | null>(null); // open show ratingKey (null = grid)
 
   const browseQ = useInfiniteQuery({
-    queryKey: ["plex-browse", library, dq, sort],
-    enabled: !!library && !openShow,
+    queryKey: ["plex-browse", library, dq, sort, show],
+    enabled: !!library && sub.view === null,
     initialPageParam: 0,
     queryFn: ({ pageParam }) =>
-      api.plexBrowse({ library: library!, q: dq || undefined, sort, offset: pageParam as number, limit: PAGE }),
+      api.plexBrowse({ library, q: dq || undefined, sort, show, offset: pageParam as number, limit: PAGE }),
     getNextPageParam: (last) => {
       const seen = last.offset + last.items.length;
       return seen < last.total ? seen : undefined;
@@ -58,77 +44,44 @@ export default function PlexBrowse({ filters, setFilters }: Props) {
   const items = browseQ.data?.pages.flatMap((p) => p.items) ?? [];
   const total = browseQ.data?.pages[0]?.total ?? 0;
 
-  function exitPlex() {
-    setFilters({ ...filters, librarySource: "organic", q: "" });
-  }
+  // Infinite scroll: auto-load the next page when the sentinel scrolls into view.
+  const sentinel = useRef<HTMLDivElement>(null);
+  const { hasNextPage, isFetchingNextPage, fetchNextPage } = browseQ;
+  useEffect(() => {
+    const el = sentinel.current;
+    if (!el) return;
+    const io = new IntersectionObserver(
+      (entries) => {
+        if (entries[0].isIntersecting && hasNextPage && !isFetchingNextPage) fetchNextPage();
+      },
+      { rootMargin: "600px" },
+    );
+    io.observe(el);
+    return () => io.disconnect();
+  }, [hasNextPage, isFetchingNextPage, fetchNextPage]);
+
   function onPlay(card: PlexCard) {
-    // P2 wires the real player; announce for now so the flow is visible in P1.
     notify({ level: "info", message: t("plex.playerSoon", { title: card.title }) });
   }
   function onCard(card: PlexCard) {
-    if (card.type === "show") setOpenShow(card.id);
+    if (card.type === "show") sub.open(card.id);
     else onPlay(card);
   }
 
-  if (openShow) {
-    return <PlexShowView showId={openShow} onBack={() => setOpenShow(null)} onPlay={onPlay} onExit={exitPlex} />;
+  if (sub.view) {
+    return <PlexShowView showId={sub.view} onBack={sub.back} onPlay={onPlay} />;
   }
 
   return (
     <div className="p-4 max-w-[1600px] mx-auto">
-      {/* Toolbar: back-to-YouTube, library scope, search, sort */}
-      <div className="flex flex-wrap items-center gap-2 mb-4">
-        <button
-          onClick={exitPlex}
-          className="glass-card glass-hover inline-flex items-center gap-1.5 px-2.5 py-1.5 rounded-lg text-xs"
-          title={t("plex.backToFeed")}
-        >
-          <ArrowLeft className="w-4 h-4" />
-          {t("plex.backToFeed")}
-        </button>
-        <span className="mx-1 h-5 w-px bg-border" aria-hidden="true" />
-        <div className="inline-flex items-center gap-1">
-          {libs.map((l) => (
-            <button
-              key={l.key}
-              onClick={() => setLibrary(l.key)}
-              className={`inline-flex items-center gap-1.5 px-3 py-1.5 rounded-lg text-xs transition ${
-                l.key === library ? "bg-accent text-white" : "glass-card glass-hover"
-              }`}
-            >
-              {l.kind === "movie" ? <Film className="w-3.5 h-3.5" /> : <Tv2 className="w-3.5 h-3.5" />}
-              {l.title}
-              <span className="opacity-60">{l.count.toLocaleString()}</span>
-            </button>
-          ))}
-        </div>
-        <div className="relative ml-auto">
-          <Search className="w-4 h-4 absolute left-2.5 top-1/2 -translate-y-1/2 text-muted" />
-          <input
-            value={q}
-            onChange={(e) => setQ(e.target.value)}
-            placeholder={t("plex.searchPlaceholder")}
-            className="bg-card border border-border rounded-lg pl-8 pr-3 py-1.5 text-sm w-56 outline-none focus:border-accent"
-          />
-        </div>
-        <select
-          value={sort}
-          onChange={(e) => setSort(e.target.value)}
-          className="bg-card border border-border rounded-lg px-2 py-1.5 text-xs outline-none focus:border-accent"
-        >
-          <option value="added">{t("plex.sort.added")}</option>
-          <option value="title">{t("plex.sort.title")}</option>
-        </select>
-      </div>
-
       <p className="text-xs text-muted mb-3">
-        {dq ? t("plex.searchCount", { count: total }) : t("plex.count", { count: total })}
+        {browseQ.isLoading ? " " : dq ? t("plex.searchCount", { count: total }) : t("plex.count", { count: total })}
       </p>
 
       {browseQ.isLoading ? (
         <p className="text-muted text-sm">{t("plex.loading")}</p>
       ) : items.length === 0 ? (
-        <p className="text-muted text-sm">{t("plex.empty")}</p>
+        <p className="text-muted text-sm">{dq ? t("plex.noMatches") : t("plex.empty")}</p>
       ) : (
         <div className="grid grid-cols-[repeat(auto-fill,minmax(150px,1fr))] gap-3">
           {items.map((c) => (
@@ -137,17 +90,8 @@ export default function PlexBrowse({ filters, setFilters }: Props) {
         </div>
       )}
 
-      {browseQ.hasNextPage && (
-        <div className="flex justify-center mt-5">
-          <button
-            onClick={() => browseQ.fetchNextPage()}
-            disabled={browseQ.isFetchingNextPage}
-            className="glass-card glass-hover px-4 py-2 rounded-xl text-sm disabled:opacity-50"
-          >
-            {browseQ.isFetchingNextPage ? t("plex.loading") : t("plex.loadMore")}
-          </button>
-        </div>
-      )}
+      <div ref={sentinel} className="h-8" />
+      {isFetchingNextPage && <p className="text-center text-xs text-muted pb-4">{t("plex.loading")}</p>}
     </div>
   );
 }
@@ -166,12 +110,18 @@ function PlexPosterCard({ card, onClick }: { card: PlexCard; onClick: () => void
       ? Math.min(100, Math.round(((card.position_seconds ?? 0) / card.duration_seconds) * 100))
       : 0;
   return (
-    <button onClick={onClick} className="group text-left">
+    <button
+      onClick={onClick}
+      className="group text-left"
+      // content-visibility keeps off-screen posters cheap to render (smoother long-list scroll).
+      style={{ contentVisibility: "auto", containIntrinsicSize: "auto 300px" } as CSSProperties}
+    >
       <div className="relative aspect-[2/3] rounded-xl overflow-hidden bg-card border border-border">
         <img
           src={card.thumb}
           alt=""
           loading="lazy"
+          decoding="async"
           className="w-full h-full object-cover group-hover:scale-105 transition-transform duration-200"
         />
         {card.status === "watched" && (
@@ -197,9 +147,7 @@ function PlexPosterCard({ card, onClick }: { card: PlexCard; onClick: () => void
         )}
       </div>
       <div className="mt-1.5 text-sm font-medium line-clamp-2 leading-tight">{card.title}</div>
-      <div className="text-xs text-muted">
-        {[card.year, secs(card.duration_seconds)].filter(Boolean).join(" · ")}
-      </div>
+      <div className="text-xs text-muted">{[card.year, dur(card.duration_seconds)].filter(Boolean).join(" · ")}</div>
     </button>
   );
 }
@@ -208,12 +156,10 @@ function PlexShowView({
   showId,
   onBack,
   onPlay,
-  onExit,
 }: {
   showId: string;
   onBack: () => void;
   onPlay: (c: PlexCard) => void;
-  onExit: () => void;
 }) {
   const { t } = useTranslation();
   const q = useQuery({ queryKey: ["plex-show", showId], queryFn: () => api.plexShow(showId) });
@@ -221,18 +167,13 @@ function PlexShowView({
 
   return (
     <div className="p-4 max-w-[1200px] mx-auto">
-      <div className="flex items-center gap-2 mb-4">
-        <button
-          onClick={onBack}
-          className="glass-card glass-hover inline-flex items-center gap-1.5 px-2.5 py-1.5 rounded-lg text-xs"
-        >
-          <ArrowLeft className="w-4 h-4" />
-          {t("plex.backToLibrary")}
-        </button>
-        <button onClick={onExit} className="text-xs text-muted hover:text-fg ml-1">
-          {t("plex.backToFeed")}
-        </button>
-      </div>
+      <button
+        onClick={onBack}
+        className="glass-card glass-hover inline-flex items-center gap-1.5 px-2.5 py-1.5 rounded-lg text-xs mb-4"
+      >
+        <ArrowLeft className="w-4 h-4" />
+        {t("plex.backToLibrary")}
+      </button>
 
       {q.isLoading || !d ? (
         <p className="text-muted text-sm">{t("plex.loading")}</p>
@@ -282,7 +223,7 @@ function PlexShowView({
                         {ep.summary && (
                           <div className="text-xs text-muted line-clamp-2 mt-0.5">{ep.summary}</div>
                         )}
-                        <div className="text-[11px] text-muted mt-0.5">{secs(ep.duration_seconds)}</div>
+                        <div className="text-[11px] text-muted mt-0.5">{dur(ep.duration_seconds)}</div>
                       </div>
                     </button>
                   );
diff --git a/frontend/src/components/PlexSidebar.tsx b/frontend/src/components/PlexSidebar.tsx
new file mode 100644
index 0000000..9d14f34
--- /dev/null
+++ b/frontend/src/components/PlexSidebar.tsx
@@ -0,0 +1,135 @@
+import { useEffect } from "react";
+import { useTranslation } from "react-i18next";
+import { useQuery } from "@tanstack/react-query";
+import { ChevronRight, Film, SlidersHorizontal, Tv2 } from "lucide-react";
+import { api } from "../lib/api";
+
+// The Plex module's left filter column (mirrors the feed Sidebar's shell): pick a library, filter
+// by watch state (movie libraries only), and sort. State is owned by App (per-account persisted).
+
+type Props = {
+  library: string;
+  setLibrary: (v: string) => void;
+  show: string;
+  setShow: (v: string) => void;
+  sort: string;
+  setSort: (v: string) => void;
+  collapsed: boolean;
+  onToggleCollapse: () => void;
+};
+
+const SHOW_OPTS = ["all", "unwatched", "in_progress", "watched"] as const;
+const SORT_OPTS = ["added", "title"] as const;
+
+export default function PlexSidebar({
+  library,
+  setLibrary,
+  show,
+  setShow,
+  sort,
+  setSort,
+  collapsed,
+  onToggleCollapse,
+}: Props) {
+  const { t } = useTranslation();
+  const libsQ = useQuery({ queryKey: ["plex-libraries"], queryFn: api.plexLibraries });
+  const libs = libsQ.data?.libraries ?? [];
+  const activeLib = libs.find((l) => l.key === library);
+
+  // Default to the first library once loaded (or if the stored one vanished).
+  useEffect(() => {
+    if (libs.length && !libs.some((l) => l.key === library)) setLibrary(libs[0].key);
+  }, [libs, library, setLibrary]);
+
+  const isMovieLib = activeLib?.kind === "movie";
+  const activeCount = (show !== "all" && isMovieLib ? 1 : 0) + (sort !== "added" ? 1 : 0);
+
+  if (collapsed) {
+    return (
+      <aside className="hidden md:flex w-[46px] shrink-0 flex-col items-center gap-2 border-r border-border bg-surface/40 py-3">
+        <button
+          onClick={onToggleCollapse}
+          title={t("sidebar.expandPanel")}
+          aria-label={t("sidebar.expandPanel")}
+          className="p-1 rounded-md text-muted hover:text-fg hover:bg-card transition"
+        >
+          <ChevronRight className="w-4 h-4" />
+        </button>
+        <button
+          onClick={onToggleCollapse}
+          title={t("sidebar.filters")}
+          className="relative p-2 rounded-lg text-muted hover:text-fg hover:bg-card transition"
+        >
+          <SlidersHorizontal className="w-5 h-5" />
+          {activeCount > 0 && (
+            <span className="absolute -top-1 -right-1 min-w-[16px] h-4 px-1 rounded-full bg-accent text-accent-fg text-[10px] font-bold leading-none grid place-items-center ring-2 ring-bg">
+              {activeCount}
+            </span>
+          )}
+        </button>
+      </aside>
+    );
+  }
+
+  return (
+    <aside className="hidden md:block w-64 shrink-0 border-r border-border bg-surface/40 overflow-y-auto p-4 space-y-4">
+      {/* Library scope */}
+      <div>
+        <div className="text-[11px] uppercase tracking-wide text-muted mb-1.5">{t("plex.filter.library")}</div>
+        <div className="flex flex-col gap-1">
+          {libs.map((l) => (
+            <button
+              key={l.key}
+              onClick={() => setLibrary(l.key)}
+              className={`inline-flex items-center gap-2 px-2.5 py-1.5 rounded-lg text-sm transition ${
+                l.key === library ? "bg-accent text-accent-fg" : "glass-card glass-hover"
+              }`}
+            >
+              {l.kind === "movie" ? <Film className="w-4 h-4" /> : <Tv2 className="w-4 h-4" />}
+              <span className="flex-1 text-left truncate">{l.title}</span>
+              <span className="opacity-60 text-xs">{l.count.toLocaleString()}</span>
+            </button>
+          ))}
+        </div>
+      </div>
+
+      {/* Watch state (movie libraries only — an episode's state lives in the show drill-down) */}
+      {isMovieLib && (
+        <div>
+          <div className="text-[11px] uppercase tracking-wide text-muted mb-1.5">{t("plex.filter.show")}</div>
+          <div className="flex flex-wrap gap-1">
+            {SHOW_OPTS.map((s) => (
+              <button
+                key={s}
+                onClick={() => setShow(s)}
+                className={`px-2.5 py-1 rounded-full text-xs transition ${
+                  show === s ? "bg-accent text-accent-fg" : "glass-card glass-hover"
+                }`}
+              >
+                {t(`plex.filter.showOpt.${s}`)}
+              </button>
+            ))}
+          </div>
+        </div>
+      )}
+
+      {/* Sort */}
+      <div>
+        <div className="text-[11px] uppercase tracking-wide text-muted mb-1.5">{t("plex.filter.sort")}</div>
+        <div className="flex flex-wrap gap-1">
+          {SORT_OPTS.map((s) => (
+            <button
+              key={s}
+              onClick={() => setSort(s)}
+              className={`px-2.5 py-1 rounded-full text-xs transition ${
+                sort === s ? "bg-accent text-accent-fg" : "glass-card glass-hover"
+              }`}
+            >
+              {t(`plex.sort.${s}`)}
+            </button>
+          ))}
+        </div>
+      </div>
+    </aside>
+  );
+}
diff --git a/frontend/src/i18n/locales/de/plex.json b/frontend/src/i18n/locales/de/plex.json
index 533cda0..6fdf507 100644
--- a/frontend/src/i18n/locales/de/plex.json
+++ b/frontend/src/i18n/locales/de/plex.json
@@ -1,4 +1,5 @@
 {
+  "navLabel": "Plex",
   "backToFeed": "YouTube-Feed",
   "backToLibrary": "Zurück zur Bibliothek",
   "searchPlaceholder": "Plex durchsuchen…",
@@ -6,8 +7,20 @@
     "added": "Kürzlich hinzugefügt",
     "title": "Titel"
   },
+  "filter": {
+    "library": "Bibliothek",
+    "show": "Anzeige",
+    "showOpt": {
+      "all": "Alle",
+      "unwatched": "Ungesehen",
+      "in_progress": "Läuft",
+      "watched": "Gesehen"
+    },
+    "sort": "Sortierung"
+  },
   "count": "{{count}} Titel",
   "searchCount": "{{count}} Treffer",
+  "noMatches": "Keine Treffer.",
   "loading": "Wird geladen…",
   "empty": "Noch nichts hier. Starte eine Plex-Synchronisierung auf der Admin-Konfigurationsseite.",
   "loadMore": "Mehr laden",
diff --git a/frontend/src/i18n/locales/en/plex.json b/frontend/src/i18n/locales/en/plex.json
index cf9d575..63cac4a 100644
--- a/frontend/src/i18n/locales/en/plex.json
+++ b/frontend/src/i18n/locales/en/plex.json
@@ -1,4 +1,5 @@
 {
+  "navLabel": "Plex",
   "backToFeed": "YouTube feed",
   "backToLibrary": "Back to library",
   "searchPlaceholder": "Search Plex…",
@@ -6,8 +7,20 @@
     "added": "Recently added",
     "title": "Title"
   },
+  "filter": {
+    "library": "Library",
+    "show": "Show",
+    "showOpt": {
+      "all": "All",
+      "unwatched": "Unwatched",
+      "in_progress": "In progress",
+      "watched": "Watched"
+    },
+    "sort": "Sort"
+  },
   "count": "{{count}} titles",
   "searchCount": "{{count}} matches",
+  "noMatches": "No matches.",
   "loading": "Loading…",
   "empty": "Nothing here yet. Run a Plex sync from the admin Config page.",
   "loadMore": "Load more",
diff --git a/frontend/src/i18n/locales/hu/plex.json b/frontend/src/i18n/locales/hu/plex.json
index 611b2ca..df833d2 100644
--- a/frontend/src/i18n/locales/hu/plex.json
+++ b/frontend/src/i18n/locales/hu/plex.json
@@ -1,4 +1,5 @@
 {
+  "navLabel": "Plex",
   "backToFeed": "YouTube feed",
   "backToLibrary": "Vissza a könyvtárhoz",
   "searchPlaceholder": "Keresés a Plexben…",
@@ -6,8 +7,20 @@
     "added": "Nemrég hozzáadott",
     "title": "Cím"
   },
+  "filter": {
+    "library": "Könyvtár",
+    "show": "Megjelenítés",
+    "showOpt": {
+      "all": "Mind",
+      "unwatched": "Nem nézett",
+      "in_progress": "Folyamatban",
+      "watched": "Megnézett"
+    },
+    "sort": "Rendezés"
+  },
   "count": "{{count}} cím",
   "searchCount": "{{count}} találat",
+  "noMatches": "Nincs találat.",
   "loading": "Betöltés…",
   "empty": "Még nincs itt semmi. Futtass egy Plex-szinkront az admin Konfiguráció oldalról.",
   "loadMore": "Több betöltése",
diff --git a/frontend/src/lib/api.ts b/frontend/src/lib/api.ts
index 3114648..a310c0b 100644
--- a/frontend/src/lib/api.ts
+++ b/frontend/src/lib/api.ts
@@ -992,12 +992,14 @@ export const api = {
     library: string;
     q?: string;
     sort?: string;
+    show?: string;
     offset?: number;
     limit?: number;
   }): Promise<PlexBrowseResult> => {
     const u = new URLSearchParams({ library: p.library });
     if (p.q) u.set("q", p.q);
     if (p.sort) u.set("sort", p.sort);
+    if (p.show && p.show !== "all") u.set("show", p.show);
     if (p.offset) u.set("offset", String(p.offset));
     if (p.limit) u.set("limit", String(p.limit));
     return req(`/api/plex/browse?${u.toString()}`);
diff --git a/frontend/src/lib/pageMeta.ts b/frontend/src/lib/pageMeta.ts
index 19dd9d9..250a6e2 100644
--- a/frontend/src/lib/pageMeta.ts
+++ b/frontend/src/lib/pageMeta.ts
@@ -18,6 +18,8 @@ export function pageTitleKey(page: Page): string {
       return "downloads.navLabel";
     case "stats":
       return "header.usageStats";
+    case "plex":
+      return "plex.navLabel";
     case "scheduler":
       return "header.scheduler";
     case "config":
diff --git a/frontend/src/lib/storage.ts b/frontend/src/lib/storage.ts
index 7a45901..18c613b 100644
--- a/frontend/src/lib/storage.ts
+++ b/frontend/src/lib/storage.ts
@@ -23,6 +23,9 @@ export const LS = {
   filterCollapsed: "siftlode.filterCollapsed",
   playlist: "siftlode.playlist",
   plSort: "siftlode.plSort",
+  plexLibrary: "siftlode.plexLibrary",
+  plexShow: "siftlode.plexShow",
+  plexSort: "siftlode.plexSort",
   notifHistory: "siftlode.notifications",
   notifSettings: "siftlode.notifSettings",
   onboardingDismissed: "siftlode.onboarding.dismissed",
diff --git a/frontend/src/lib/urlState.ts b/frontend/src/lib/urlState.ts
index 004e2df..3cfec21 100644
--- a/frontend/src/lib/urlState.ts
+++ b/frontend/src/lib/urlState.ts
@@ -101,6 +101,7 @@ export const PAGES = [
   "notifications",
   "messages",
   "downloads",
+  "plex",
 ] as const;
 
 export type Page = (typeof PAGES)[number];