“FEAR HER” – Series 2, Episode 11, Story 176 – Written by Matthew Graham; Directed by Euros Lynn – The Tenth Doctor and Rose show up in 2012 to watch the London Olympics, but they get sidetracked by a bunch of disappearing kids in a cul-de-sac. Turns out there's a kid named Chloe Webber who's making kids disappear by drawing them, except she's really not a kid but a kid with an alien living inside of her.
Lots of people searching today for the David Tennant / Doctor Who / Olympics bit. Well, this is the episode. And it may be the single worst episode of the entire relaunch.