diff --git a/app/modules/themoviedb/scraper.py b/app/modules/themoviedb/scraper.py
index ff6768bdb..a785d9767 100644
--- a/app/modules/themoviedb/scraper.py
+++ b/app/modules/themoviedb/scraper.py
@@ -233,6 +233,15 @@ class TmdbScraper:
                 return _episode_info
         return {}
 
+    @staticmethod
+    def __normalize_tmdb_id(value: object) -> Optional[int]:
+        """将外部集数据中的 TMDB ID 规范化为正整数。"""
+        try:
+            normalized = int(str(value).strip())
+        except (TypeError, ValueError):
+            return None
+        return normalized if normalized > 0 else None
+
     @staticmethod
     def __gen_common_nfo(
         mediainfo: MediaInfo, doc: minidom.Document, root: minidom.Element
@@ -404,12 +413,13 @@ class TmdbScraper:
         doc = minidom.Document()
         root = DomUtils.add_node(doc, doc, "episodedetails")
         # TMDBID
-        uniqueid = DomUtils.add_node(doc, root, "uniqueid", str(episodeinfo.get("id")))
-        uniqueid.setAttribute("type", "tmdb")
-        uniqueid.setAttribute("default", "true")
-        # tmdbid
-        # 应与uniqueid一致 使用剧集id 否则jellyfin/emby会将此id覆盖上面的uniqueid
-        DomUtils.add_node(doc, root, "tmdbid", str(episodeinfo.get("id")))
+        episode_tmdb_id = TmdbScraper.__normalize_tmdb_id(episodeinfo.get("id"))
+        if episode_tmdb_id:
+            uniqueid = DomUtils.add_node(doc, root, "uniqueid", str(episode_tmdb_id))
+            uniqueid.setAttribute("type", "tmdb")
+            uniqueid.setAttribute("default", "true")
+            # 应与uniqueid一致，使用剧集id否则Jellyfin/Emby会覆盖上面的uniqueid。
+            DomUtils.add_node(doc, root, "tmdbid", str(episode_tmdb_id))
         # 标题
         DomUtils.add_node(
             doc, root, "title", episodeinfo.get("name") or "第 %s 集" % episode
diff --git a/tests/test_tmdb_episode_nfo.py b/tests/test_tmdb_episode_nfo.py
new file mode 100644
index 000000000..e09d8bae5
--- /dev/null
+++ b/tests/test_tmdb_episode_nfo.py
@@ -0,0 +1,26 @@
+import pytest
+
+from app.modules.themoviedb.scraper import TmdbScraper
+
+
+@pytest.mark.parametrize(
+    ("episode_id", "expected_tmdb_id"),
+    ((None, None), ("None", None), ("not-a-number", None), (129, "129")),
+)
+def test_episode_nfo_omits_invalid_tmdb_id(episode_id, expected_tmdb_id):
+    """集查询返回无效 ID 时应省略身份节点，但保留其余集元数据。"""
+    document = TmdbScraper._TmdbScraper__gen_tv_episode_nfo_file(
+        tmdbid=100,
+        episodeinfo={"id": episode_id, "name": "测试集"},
+        season=2,
+        episode=3,
+    )
+
+    xml = document.toxml()
+    if expected_tmdb_id is None:
+        assert "<tmdbid>" not in xml
+        assert "<uniqueid" not in xml
+    else:
+        assert f"<tmdbid>{expected_tmdb_id}</tmdbid>" in xml
+        assert f'<uniqueid type="tmdb" default="true">{expected_tmdb_id}</uniqueid>' in xml
+    assert "<title>测试集</title>" in xml