I saw this easy fun game on the Harry Potter spot and so I thought it'd be good to give it a try on the Doctor Who spot. Basically, you start with a Doctor Who - related item, place, character, episode, etc. and the next person has to think of another word that begins with the last letter of the previous word.
For example, if one poster writes : Dalek
The next poster could write: Krillitane
and so on....