"Captive Hearts" provides examples of
- Adaptational Superpower Change: Leech is depicted as possessing telekinetic powers besides those of his comic books counterpart.
- Annalee's powers are more hypnotic here than those of her comic books counterpart
- Crazy Jealous Guy: Wolverine's unrequited feelings for Jean cause him to act this way towards Cyclops.
- Mind over Matter: Leech
- Stalker with a Test Tube: Callisto abducts Cyclops so he can, ah, give her an heir.
- Wainscot Society/Beneath the Earth: The Morlocks are an underground community of homeless mutants, many of whom can't pass off as regular humans due to their physical mutations.