The Time of the Doctor (TheThirteenth)

The Fall of the Doctor was the Doctor Who Christmas special broadcast in 2013. Matt Smith made his final regular appearance, Peter Capaldi his first. It resolved the stories of the Great Intelligence and the Silence, and re-introduced the Dream Lord (briefly.)

Plot
Clara is having Christmas Dinner with her father. Once she is finished, she goes out for a walk. She is in the middle of a field when she hears the TARDIS. The Doctor walks out. He asks what she is doing outside, and she says she doesn't like Christmas. She asks him to come with her to the Christmas fair she's taking Angie and Artie to, which he says yes to.

The Great Intelligence reforms itself inside the Doctor's timestream. It exits and arrives on Trenzalore.