Amy goes to the bathroom only to be confronted by the Silence in episode 6x01 "The Impossible Astronaut".
The Doctor visits Kazran in the past and encounters a shark in his bedroom in episode 6x00 "A Christmas Carol".
Dr. Simeon collects snow samples for sphere of snow in 2012 Christmas special "The Snowmen".
Billy Shipton shows Sally the collection of cars stored beneath the police station in episode 3x10 "Blink".
The voyagers on the spacecraft share dinner before the ship is hit in 2007 Christmas special "Voyage of the Damned".
The Doctor takes Bill into the vault where they talk with Missy about defeating the monks in episode 10x08 "The Lie of the Land".
Bill struggles against the mind control while walking down the street in episode 10x08 "The Lie of the Land".