Funny thing is I've never actually been able to sit through a single episode of Doctor Who. New or old. Just go out of my way to make alien races sufficiently alien when I do NRPs. 

Toyed with the idea once of making a NRP where one of the big rules was you couldn't make a species too similar to someone else's. I.E. if the first guy makes a humanoid--that's it--pick/create a different body suited for another world.