Trivia: Doctor Who S32 E1 "The Impossible Astronaut"
- In Memoriam: Dedicated to Elisabeth Sladen. Unlike past dedications in Doctor Who, this dedication card opens the episode rather than ending it. Meanwhile, BBC America placed it at the end of the episode. BBC America also made one other change to their version: rather than just the black slate, they added a shot from "School Reunion" of Elisabeth Sladen walking away from the camera, only to turn around and wave at the audience before the card faded to black.
- Real-Life Relative: Mark Sheppard plays Canton Everett Delaware in 1969. His father William Morgan Sheppard plays old Canton for the scene at Lake Powell in 2011.