While sleeping over, the TARDIS decides to play a prank on Clara, much to her displeasure.
| Actor | Role |
|---|---|
 Jenna ColemanClara Oswald | Clara Oswald |
 Sophie AldredAce (archive footage) | Ace (archive footage) |
 Freema AgyemanMartha Jones (archive footage) | Martha Jones (archive footage) |
 Sarah SuttonNyssa (archive footage) | Nyssa (archive footage) |
 Nicola BryantPeri Brown (archive footage) | Peri Brown (archive footage) |
 Mary TammRomana I (archive footage) | Romana I (archive footage) |
 Lalla WardRomana II (archive footage) | Romana II (archive footage) |
 Billie PiperRose Tyer (archive footage) | Rose Tyer (archive footage) |
 Elisabeth SladenSarah-Jane Smith (archive footage) | Sarah-Jane Smith (archive footage) |
 Karen GillanAmy Pond (archive footage) | Amy Pond (archive footage) |