- Morlocks (Main story and flashback)
- Santa Claus (Mentioned)
- Sabertooth (Graydon Creed, Sr.) (Mentioned)
- Scepter of Leadership
- Stolen ambulance
Jubilee's first Christmas with the X-Men doesn't go exactly as she expected, when she, Storm, and Wolverine become involved with a mission to save the Morlock child known as Leech.
- Though Marianna is an original character to this series, she's apparently based on a Marvel Universe, non-Morlock character named Marrina Smallwood, who was married to the Namor the Sub-Mariner for a while, and spent stints on the super-hero teams Alpha Flight and the Avengers were she was killed after mutating into a giant sea creature.