Continuity mistake: During the battle in Callisto's cave hideout, Callisto leaves her sword behind when she runs to her chariot. When Callisto sinks in the quicksand, her sword and dagger are not seen. When Xena encounters Callisto in the underworld in "Intimate Stranger", Callisto's sword and dagger have reappeared.
Xena: Warrior Princess (1995)
1 continuity 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.