Writer: James Mathieson
Director: Douglas MacKinnon
Producer: Nikki Wilson
Companion: Clara Oswald (Jenna Coleman)
Series: 8, ep. 9
Summary: Clara and the Doctor come out of the TARDIS and discover it is smaller than normal. Clara steps out to investigate, leaving the Doctor to determine if something is wrong with the TARDIS itself. When she returns, the TARDIS is even smaller, and now the Doctor is trapped inside. Clara discovers people have disappeared, trapped in walls or murals. The culprit is a race of aliens that are actually two-dimensional.