Hmmm, but Nina used to be Jack's most trusted ally, remember? At least she was pre-S1. Hehe, although if we really want to stick to the Dickens lore, maybe we should pick Henderson as Marley since he was Jack's mentor.

Mason works though, I say we go with him. Instead of chains, he can be all blown up in a tattered suit. And I change my vote to Palmer as Christmas Present, because Chapelle would be too much angst for Jack and he didn't know Larry well enough.

So:

Bob Marley- George Mason
Ghost of CTU Past- Teri
Past!Jack - Renee
Ghost of CTU Present- Palmer?
Present!Jack: Jack
Scrooge's Nephew- Kim
Bob Cratchit- Chloe
Cratchit wife- Morris (heehee)
Tiny Tim- Prescott
Ghost of CTU Future- Nina
Future!Jack- Tony

Now fic it as part of Jack's hallucinations. Aaaaand GO!