1. Willow Rosenberg (She could bond with Merlin about magic)
2. Dean Winchester (You know you want to see Dean and Arthur in a macho pissing contest)
3. Draco Malfoy (I'd love to see how he handled living in a world where magic is banned)
4. Malcolm Reynolds (Well someone needs to teach him how to fight with a sword)
5. The Tenth Doctor (Just because he'd love it)