Susan: The Sensorites
Tenth Doctor: Gridlock
I think they might be in Doctor Who too
I suppose it's karma that he dies 3 minutes later.
Artist Chrstie (tee-kyrin) put out this teaser of work she'll have available at both Megacon and Florida Supercon. Stop by her table, for the companion a time traveler could ask for.
I hope #3 has an Inverness cape.