diff --git a/app/services/downloads.py b/app/services/downloads.py
index c0c8508..16f21e3 100644
--- a/app/services/downloads.py
+++ b/app/services/downloads.py
@@ -76,6 +76,33 @@ def series_dirname(title: str) -> str | None:
     base = sanitize_filename(match.group(1).strip()) if match else ""
     return base or None
 
+
+_EPISODE_RE = re.compile(
+    r"^(?P<series>.+?)\s*-\s*(?:Saison\s+(?P<season>\d+)\s*-\s*)?"
+    r"E(?P<ep>\d+(?:[.,]\d+)?)(?P<tail>\s*\([^)]*\))?\s*$",
+    re.IGNORECASE,
+)
+
+
+def plex_filename(title: str, extension: str) -> str | None:
+    """Nom de fichier compatible Plex (« S01E09 ») pour un titre d'épisode.
+
+    Les scrapers produisent « Série - Saison 1 - E9 (VF) » ; le scanner Plex
+    exige « Série - S01E09 (VF) » (les épisodes 1-9 sont sinon ignorés).
+    None si le titre ne suit pas le format épisode → nommage inchangé.
+    """
+    match = _EPISODE_RE.match(title)
+    if not match:
+        return None
+    series = match.group("series")
+    season = int(match.group("season") or 1)
+    ep_raw = match.group("ep").replace(",", ".")
+    ep = float(ep_raw)
+    ep_label = f"{int(ep):02d}" if ep.is_integer() else ep_raw
+    tail = match.group("tail") or ""
+    return sanitize_filename(f"{series} - S{season:02d}E{ep_label}{tail}") + extension
+
+
 class DownloadManager:
     """File d'attente de téléchargements, injectée dans les routes via app.state."""
 
@@ -174,7 +201,8 @@ class DownloadManager:
             logger.info("Anti-doublon : %s déjà en file (id=%s)", title, existing["id"])
             return self._to_dict(existing, duplicate=True)
 
-        filename = sanitize_filename(title) + self._guess_extension(video_url)
+        extension = self._guess_extension(video_url)
+        filename = plex_filename(title, extension) or sanitize_filename(title) + extension
         series = series_dirname(title)
         file_path = f"{series}/{filename}" if series else filename
         cursor = await db.execute(
diff --git a/tests/test_core.py b/tests/test_core.py
index 6908726..0fa804d 100644
--- a/tests/test_core.py
+++ b/tests/test_core.py
@@ -10,7 +10,7 @@ from app.scrapers.base import (
     import_all_scrapers,
     resolve_hoster,
 )
-from app.services.downloads import sanitize_filename
+from app.services.downloads import plex_filename, sanitize_filename
 
 # ------------------------------------------------------------ format interne
 
@@ -52,6 +52,32 @@ def test_sanitize_no_traversal():
     assert sanitize_filename("../../etc/passwd") == "etc passwd"
 
 
+# ------------------------------------------------------------ nommage Plex
+
+
+@pytest.mark.parametrize(
+    ("title", "expected"),
+    [
+        (
+            "The Eminence in Shadow - Saison 1 - E9 (VF)",
+            "The Eminence in Shadow - S01E09 (VF).mp4",
+        ),
+        (
+            "The Eminence in Shadow - Saison 1 - E10 (VF)",
+            "The Eminence in Shadow - S01E10 (VF).mp4",
+        ),
+        ("Anime X - E1 (VOSTFR)", "Anime X - S01E01 (VOSTFR).mp4"),
+        ("One Piece - E1122", "One Piece - S01E1122.mp4"),
+        ("Série - saison 2 - e3 (vf)", "Série - S02E03 (vf).mp4"),
+        ("Episode Test 1", None),
+        ("Mon Titre", None),
+        ("Series S01E05 VOSTFR WEB-DL", None),
+    ],
+)
+def test_plex_filename(title, expected):
+    assert plex_filename(title, ".mp4") == expected
+
+
 # ------------------------------------------------------------ auth
 
 
diff --git a/tests/test_downloads.py b/tests/test_downloads.py
index 30fd302..3816ef7 100644
--- a/tests/test_downloads.py
+++ b/tests/test_downloads.py
@@ -139,7 +139,7 @@ async def test_series_subfolder_and_scan(file_server, manager):
     d = await dm.enqueue(f"{file_server}/video.mp4", "http://page", "Anime Z - E7 (VOSTFR)")
     data = await _wait_status(d["id"], {"done", "failed"})
     assert data["status"] == "done", data.get("error")
-    assert data["file_path"] == "Anime Z/Anime Z - E7 (VOSTFR).mp4"
+    assert data["file_path"] == "Anime Z/Anime Z - S01E07 (VOSTFR).mp4"
     assert (get_settings().download_dir / data["file_path"]).read_bytes() == PAYLOAD
 
     # DB vidée + redémarrage → le fichier en sous-dossier est restauré tel quel
@@ -148,4 +148,4 @@ async def test_series_subfolder_and_scan(file_server, manager):
     await dm.start()
     items = await dm.list_all()
     paths = [i["file_path"] for i in items]  # d'autres fichiers de tests peuvent trainer
-    assert "Anime Z/Anime Z - E7 (VOSTFR).mp4" in paths
+    assert "Anime Z/Anime Z - S01E07 (VOSTFR).mp4" in paths