In-Fez-Station

This is a fun story, with the Doctor and the Ponds landing in the home of the fez and discovering that somebody is using them to control people. It features the return of the Slitheen, so how much you enjoy this story depends how much you like or dislike those alien creatures. Personally I was never a fan of them, I found them annoying and felt they downgraded the show's intelligence with all the fart jokes.

The central premise of the story with the mind controlling fezzes is quite an amusing and unique idea, but the ending is rushed and I just don't buy the Slitheen as a credible threat.