diff --git a/youtube_dl/extractor/extractors.py b/youtube_dl/extractor/extractors.py
index 5c1d2abfb..08bed8b0c 100644
--- a/youtube_dl/extractor/extractors.py
+++ b/youtube_dl/extractor/extractors.py
@@ -348,7 +348,10 @@
 from .gputechconf import GPUTechConfIE
 from .groupon import GrouponIE
 from .hark import HarkIE
-from .hbo import HBOIE
+from .hbo import (
+    HBOIE,
+    HBOEpisodeIE,
+)
 from .hearthisat import HearThisAtIE
 from .heise import HeiseIE
 from .hellporno import HellPornoIE