Married with Fishsticks - S5-E15
Revealing mistake: In the scene where "Crustacea" is being hung upside down in the water by the children, you can see her wig detaching on the sides by her ears.
Xena: Warrior Princess (1995)
1 revealing mistake in season 5 - 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.