Revealing mistake: After Xena gets out of that chair, she does a swinging kick from her whip and you get a shot of her feet connecting with her victim's chest. The fake feet that are used are seen bending backwards.
Xena: Warrior Princess (1995)
1 revealing mistake in Return of Callisto - chronological order
Continuity mistake: Xena leaves Darius' house, where she forgets her chakram. Then there's a shot of her riding Argo, with the chakram attached to her hip. Later Darius shows up to bring the 'missing' chakram to her.
Trivia: Karl Urban, who plays Cupid in this episode, also plays Caesar in many episodes.