diff --git a/k-tv-frontend/app/(main)/library/components/library-grid.tsx b/k-tv-frontend/app/(main)/library/components/library-grid.tsx
index 1486d0f..3a60712 100644
--- a/k-tv-frontend/app/(main)/library/components/library-grid.tsx
+++ b/k-tv-frontend/app/(main)/library/components/library-grid.tsx
@@ -1,10 +1,18 @@
 "use client";
 
+import { useLibraryShows } from "@/hooks/use-library-shows";
+import { useLibrarySeasons } from "@/hooks/use-library-seasons";
 import { LibraryItemCard } from "./library-item-card";
+import { ShowTile } from "./show-tile";
+import { SeasonTile } from "./season-tile";
+import { BreadcrumbNav } from "./breadcrumb-nav";
 import { ScheduleFromLibraryDialog } from "./schedule-from-library-dialog";
 import { AddToBlockDialog } from "./add-to-block-dialog";
 import { Button } from "@/components/ui/button";
-import type { LibraryItemFull } from "@/lib/types";
+import type { LibraryItemFull, ShowSummary } from "@/lib/types";
+import type { LibrarySearchParams } from "@/hooks/use-library-search";
+
+type Drilldown = null | { series: string } | { series: string; season: number };
 
 interface Props {
   items: LibraryItemFull[];
@@ -16,36 +24,142 @@ interface Props {
   onToggleSelect: (id: string) => void;
   onPageChange: (page: number) => void;
   selectedItems: LibraryItemFull[];
+  viewMode: "grouped" | "flat";
+  drilldown: Drilldown;
+  onDrilldown: (next: Drilldown) => void;
+  filter: LibrarySearchParams;
+  selectedShows: ShowSummary[];
+  selectedShowNames: Set<string>;
+  onToggleSelectShow: (show: ShowSummary) => void;
 }
 
 export function LibraryGrid({
   items, total, page, pageSize, isLoading,
   selected, onToggleSelect, onPageChange, selectedItems,
+  viewMode, drilldown, onDrilldown, filter,
+  selectedShows, selectedShowNames, onToggleSelectShow,
 }: Props) {
   const totalPages = Math.ceil(total / pageSize);
 
+  // Hooks for grouped mode (called unconditionally per React rules)
+  const showsFilter = {
+    q: filter.q,
+    genres: filter.genres,
+    provider: filter.provider,
+  };
+  const { data: showsData, isLoading: showsLoading } = useLibraryShows(showsFilter);
+  const seasonsSeries = (viewMode === "grouped" && drilldown !== null && !("season" in drilldown))
+    ? drilldown.series
+    : null;
+  const { data: seasonsData, isLoading: seasonsLoading } = useLibrarySeasons(
+    seasonsSeries,
+    filter.provider,
+  );
+
+  const isGroupedTopLevel = viewMode === "grouped" && drilldown === null;
+  const isSeasonLevel = viewMode === "grouped" && drilldown !== null && !("season" in drilldown);
+  const isEpisodeLevel = viewMode === "flat" || (viewMode === "grouped" && drilldown !== null && "season" in drilldown);
+
+  function renderContent() {
+    if (isGroupedTopLevel) {
+      const shows = showsData ?? [];
+      const nonEpisodes = items.filter(i => i.content_type !== "episode");
+      const loading = showsLoading;
+
+      if (loading && shows.length === 0 && nonEpisodes.length === 0) {
+        return <p className="text-sm text-zinc-500">Loading…</p>;
+      }
+      if (shows.length === 0 && nonEpisodes.length === 0) {
+        return <p className="text-sm text-zinc-500">No items found. Run a library sync to populate the library.</p>;
+      }
+      return (
+        <div className="grid grid-cols-2 gap-3 sm:grid-cols-3 md:grid-cols-4 lg:grid-cols-5 xl:grid-cols-6">
+          {shows.map(show => (
+            <ShowTile
+              key={show.series_name}
+              show={show}
+              selected={selectedShowNames.has(show.series_name)}
+              onToggle={() => onToggleSelectShow(show)}
+              onClick={() => onDrilldown({ series: show.series_name })}
+            />
+          ))}
+          {nonEpisodes.map(item => (
+            <LibraryItemCard
+              key={item.id}
+              item={item}
+              selected={selected.has(item.id)}
+              onToggle={() => onToggleSelect(item.id)}
+            />
+          ))}
+        </div>
+      );
+    }
+
+    if (isSeasonLevel && drilldown) {
+      const seasons = seasonsData ?? [];
+      if (seasonsLoading && seasons.length === 0) {
+        return <p className="text-sm text-zinc-500">Loading…</p>;
+      }
+      if (seasons.length === 0) {
+        return <p className="text-sm text-zinc-500">No seasons found.</p>;
+      }
+      return (
+        <div className="grid grid-cols-2 gap-3 sm:grid-cols-3 md:grid-cols-4 lg:grid-cols-5 xl:grid-cols-6">
+          {seasons.map(season => (
+            <SeasonTile
+              key={season.season_number}
+              season={season}
+              selected={false}
+              onToggle={() => {}}
+              onClick={() => onDrilldown({ series: drilldown.series, season: season.season_number })}
+            />
+          ))}
+        </div>
+      );
+    }
+
+    // Flat mode or episode-level drilldown
+    if (isLoading) {
+      return <p className="text-sm text-zinc-500">Loading…</p>;
+    }
+    if (items.length === 0) {
+      return <p className="text-sm text-zinc-500">No items found. Run a library sync to populate the library.</p>;
+    }
+    return (
+      <div className="grid grid-cols-2 gap-3 sm:grid-cols-3 md:grid-cols-4 lg:grid-cols-5 xl:grid-cols-6">
+        {items.map(item => (
+          <LibraryItemCard
+            key={item.id}
+            item={item}
+            selected={selected.has(item.id)}
+            onToggle={() => onToggleSelect(item.id)}
+          />
+        ))}
+      </div>
+    );
+  }
+
+  const showPagination = isEpisodeLevel && totalPages > 1;
+  const totalSelected = selected.size + selectedShows.length;
+
   return (
     <div className="flex flex-1 flex-col min-h-0">
       <div className="flex-1 overflow-y-auto p-6">
-        {isLoading ? (
-          <p className="text-sm text-zinc-500">Loading…</p>
-        ) : items.length === 0 ? (
-          <p className="text-sm text-zinc-500">No items found. Run a library sync to populate the library.</p>
-        ) : (
-          <div className="grid grid-cols-2 gap-3 sm:grid-cols-3 md:grid-cols-4 lg:grid-cols-5 xl:grid-cols-6">
-            {items.map(item => (
-              <LibraryItemCard
-                key={item.id}
-                item={item}
-                selected={selected.has(item.id)}
-                onToggle={() => onToggleSelect(item.id)}
-              />
-            ))}
-          </div>
+        {drilldown && (
+          <BreadcrumbNav
+            series={"series" in drilldown ? drilldown.series : undefined}
+            season={"season" in drilldown ? drilldown.season : undefined}
+            onNavigate={target => {
+              if (target === "root") onDrilldown(null);
+              else if (target === "series" && drilldown && "series" in drilldown)
+                onDrilldown({ series: drilldown.series });
+            }}
+          />
         )}
+        {renderContent()}
       </div>
 
-      {totalPages > 1 && (
+      {showPagination && (
         <div className="flex items-center justify-between border-t border-zinc-800 px-6 py-3">
           <p className="text-xs text-zinc-500">{total.toLocaleString()} items total</p>
           <div className="flex gap-2">
@@ -56,11 +170,11 @@ export function LibraryGrid({
         </div>
       )}
 
-      {selected.size > 0 && (
+      {totalSelected > 0 && (
         <div className="fixed bottom-6 left-1/2 -translate-x-1/2 flex items-center gap-3 rounded-full border border-zinc-700 bg-zinc-900 px-6 py-3 shadow-2xl">
-          <span className="text-sm text-zinc-300">{selected.size} selected</span>
-          <ScheduleFromLibraryDialog selectedItems={selectedItems} />
-          <AddToBlockDialog selectedItems={selectedItems} />
+          <span className="text-sm text-zinc-300">{totalSelected} selected</span>
+          <ScheduleFromLibraryDialog selectedItems={selectedItems} selectedShows={selectedShows} />
+          {selected.size > 0 && <AddToBlockDialog selectedItems={selectedItems} />}
         </div>
       )}
     </div>