| Nicholas Briggs | The Vlinx (voice) / Dalek (voice) |
| Russell T Davies | Self (uncredited) |
| Steven Moffat | Self (uncredited) |
| William Hartnell | The Doctor (1) (archive footage) |
| Patrick Troughton | The Doctor (2) (archive footage) |
| Jon Pertwee | The Doctor (3) (archive footage) |
| Tom Baker | The Doctor (4) (archive footage) |
| Peter Davison | The Doctor (5) (archive footage) |
| Colin Baker | The Doctor (6) (archive footage) |
| Sylvester McCoy | The Doctor (7) (archive footage) |
| Paul McGann | The Doctor (8) (archive footage) |
| John Hurt | The Doctor (War) (archive footage) |
| Jo Martin | The Doctor (Fugitive) (archive footage) |
| Richard E. Grant | The Doctor (archive footage) |
| Billie Piper | Rose Tyler (archive footage) |
| Freema Agyeman | Martha Jones (archive footage) |
| Arthur Darvill | Rory Williams (archive footage) |
| Pearl Mackie | Bill Potts (archive footage) |
| Mandip Gill | Yasmin Khan (archive footage) |
| Bradley Walsh | Graham O'Brein (archive footage) |
| Tosin Cole | Ryan Sinclair (archive footage) |
| Yasmin Finney | Rose Noble (archive footage) |
| Bonnie Langford | Melanie Bush (archive footage) |
| Jemma Redgrave | Kate Lethbridge-Stewart (archive footage) |
| Neil Patrick Harris | The Toymaker (archive footage) |
| Sacha Dhawan | The Master (archive footage) |
| Michelle Greenidge | Carla Sunday (archive footage) |
| Angela Wynter | Cherry Sunday (archive footage) |
| Susan Twist | Susan Triad (archive footage) |
| Jonathan Groff | Rogue (archive footage) |
| Callie Cooke | Lindy Pepper-Bean (archive footage) |
| Aneurin Barnard | Roger ap Gwilliam (archive footage) |
| Stephen Fry | C (archive footage) |
| Michael Gambon | Kazran Sardick (archive footage) |
| Katherine Jenkins | Abigail (archive footage) |
| Laurence Belcher | Young Kazran (archive footage) |
| Danny Horn | Adult Kazran (archive footage) |
| Alexander Devrient | Colonel Ibrahim (archive footage) |
| Faye McKeever | Louise Miller (archive footage) |
