Camelot Season 1 Episode 7 : The Long Night
Morgan invites Arthur and his regiment of soldiers over for an evening's entertainment and an overnight stay. During this time, she sets up a series of intrigues and hoaxes which include a faked attack on the castle, which many believe is by a former rival of Uther. At the end of the episode, Morgan has shape-shifted to look like Igraine and rides back to Camelot with Arthur in Igraine's form. Meanwhile Igraine is manacled in a dungeon.