I want a Christmas Carol episode of House so bad it's unreal. It would all work thematically and with a lot of the devices that the show uses: dreams, hallucinations, flashbacks, etc.

Stacy would probably be Christmas Past and Moriarty would be Christmas Yet to Come. Christmas Present could be one of the fellows or Cuddy or Wilson. But if Stacy were a character in the flashback then Cuddy could be the spirit for past.

Amber would be Marley because I want her to say the Muppet Christmas Carol line "Make amends and make some friends. The future's up to you." to House.