Merlin (2008)

S03E09 Love in the Time of Dragons

Gaius is surprised when an old love from his past shows up in Camelot, but her arrival is anything but ordinary. She’s been manipulated by a Manticore, which has put her under its spell. As the situation unfolds, Gaius must confront his feelings while also figuring out how to break the creature's hold over her. The reunion quickly turns into a race against time to save her from the Manticore's sinister influence.