diff --git a/web/src/pages/LibraryPage.tsx b/web/src/pages/LibraryPage.tsx
index 2448868..c211dba 100644
--- a/web/src/pages/LibraryPage.tsx
+++ b/web/src/pages/LibraryPage.tsx
@@ -132,6 +132,7 @@ export function LibraryPage() {
     selectedEpisodes,
     visibleEpisodes,
     selectedSeriesEpisodes,
+    selectedSeriesAllEpisodes,
     selectedSeriesMediaIDs,
     handleSeriesClick,
     clearSelectedSeries,
@@ -172,7 +173,7 @@ export function LibraryPage() {
     role,
     library,
     selectedSeries,
-    selectedSeriesEpisodes,
+    selectedSeriesEpisodes: selectedSeriesAllEpisodes,
     reloadCurrentLibrary,
     clearSelectedSeries,
     setManualMovie,
diff --git a/web/src/pages/useLibrarySeriesSelection.ts b/web/src/pages/useLibrarySeriesSelection.ts
index 12764e3..7d55086 100644
--- a/web/src/pages/useLibrarySeriesSelection.ts
+++ b/web/src/pages/useLibrarySeriesSelection.ts
@@ -2,6 +2,7 @@ import { useEffect, useMemo } from 'react'
 
 import type { Media } from '../types'
 import {
+  expandSeriesMediaVersions,
   getSeriesKey,
   isTheatricalFeature,
   seasonSortOrder,
@@ -77,11 +78,17 @@ export function useLibrarySeriesSelection({
     [selectedEpisodes],
   )
 
-  const selectedSeriesMediaIDs = useMemo(
-    () => selectedSeriesEpisodes.filter((ep) => !isTheatricalFeature(ep)).map((ep) => ep.id),
+  // 批量/整剧操作必须覆盖被折叠进 versions 的每一行, 否则只作用到代表行。
+  const selectedSeriesAllEpisodes = useMemo(
+    () => expandSeriesMediaVersions(selectedSeriesEpisodes),
     [selectedSeriesEpisodes],
   )
 
+  const selectedSeriesMediaIDs = useMemo(
+    () => selectedSeriesAllEpisodes.filter((ep) => !isTheatricalFeature(ep)).map((ep) => ep.id),
+    [selectedSeriesAllEpisodes],
+  )
+
   useEffect(() => {
     if (loading) return
     if (!isSeries) {
@@ -131,6 +138,7 @@ export function useLibrarySeriesSelection({
     selectedEpisodes,
     visibleEpisodes,
     selectedSeriesEpisodes,
+    selectedSeriesAllEpisodes,
     selectedSeriesMediaIDs,
     handleSeriesClick,
     clearSelectedSeries,
diff --git a/web/src/utils/groupSeries.ts b/web/src/utils/groupSeries.ts
index 19100eb..916f5fa 100644
--- a/web/src/utils/groupSeries.ts
+++ b/web/src/utils/groupSeries.ts
@@ -127,6 +127,31 @@ export function isTheatricalFeature(media: Media): boolean {
   return THEATRICAL_TITLE_RE.test(`${media.title || ''} ${path}`) || THEATRICAL_FOLDER_RE.test(path)
 }
 
+/**
+ * 把剧集列表展开成"每一行 media"。
+ *
+ * 剧集接口会把同一集的多版本(含被误判折叠的行)合成一个 item, 真实的行放在
+ * `versions` 里, 顶层只保留代表行。批量操作(整剧匹配 / 整剧刮削 / 编辑整剧 /
+ * 删除整剧)必须作用到每一行, 否则只会更新代表行, 折叠掉的版本被漏掉。
+ *
+ * 注意 `versions` 已包含代表行本身, 因此命中 versions 时不要再额外加回 item,
+ * 否则会重复。仅用于「操作」而非展示——展示仍按折叠后的剧集渲染版本切换器。
+ */
+export function expandSeriesMediaVersions(episodes: Media[] = []): Media[] {
+  const out: Media[] = []
+  const seen = new Set<string>()
+  for (const ep of episodes) {
+    if (!ep) continue
+    const rows = ep.versions && ep.versions.length > 0 ? ep.versions : [ep]
+    for (const row of rows) {
+      if (!row || !row.id || seen.has(row.id)) continue
+      seen.add(row.id)
+      out.push(row)
+    }
+  }
+  return out
+}
+
 const SPECIAL_SECTION_PATTERNS: Array<[number, RegExp]> = [
   [OVA_SEASON, /(?:^|[^a-z0-9])ovas?(?:[\s._-]*\d+)?(?:[^a-z0-9]|$)/i],
   [OAD_SEASON, /(?:^|[^a-z0-9])oads?(?:[\s._-]*\d+)?(?:[^a-z0-9]|$)/i],