Overlord Episode 10: True Vampire
Episode 10 of 13 of Overlord, aired September 8, 2015, 25 minutes. Available with English subtitles and dub where released.
Episode summary
Momonga finds out that Shalltear has revolted against him, due to something that had happened while she was on her mission with Sebas and Solution. The story rewinds a bit and goes over that very event. What could possibly change her loyalty to him?