|
|
| Actor | Episode(s) missed | Reason for absence |
|---|---|---|
| William Hartnell | The Keys of Marinus: 3 & 4 | Went on ahead to Millennium |
| The Dalek Invasion of Earth:4 | Unconscious (doubled by Edmund Warwick) | |
| The Space Museum: 3 | Put into suspended animation by Lobos | |
| The Time Meddler: 2 | Locked up by the Monk | |
| Mission to the Unknown | Not featured in story | |
| The Massacre: 2 | Visiting Preslin (Hartnell appeared as the Abbot of Amboise in episode 3) | |
| The Celestial Toymaker: 3 | Made invisible and mute by the Toymaker | |
| The Tenth Planet: 3 | Unconscious (doubled by Gordon Craig) | |
| Jacqueline Hill | The Sensorites: 4 | Stayed behind on spaceship |
| The Web Planet: 3 | Captured by the Zarbi | |
| Maureen O'Brien | Mission to the Unknown | Not featured in story |
| Peter Purves | Mission to the Unknown | Not featured in story |
| Anneke Wills | The Power of the Daleks: 4 | Kidnapped by rebels |
| The Faceless Ones: 3 to 5 | Incarcerated by the Chameleons | |
| Michael Craze | The Power of the Daleks: 5 | Unconscious |
| The Faceless Ones: 3 to 5 | Incarcerated by the Chameleons | |
| Patrick Troughton | The Web of Fear: 2 | Knocked out by explosion |
| The Wheel in Space: 2 | Unconscious (doubled by Chris Jeffries) | |
| The Seeds of Death: 4 | Unconscious | |
| Wendy Padbury | The Invasion: 3 | Captured by Vaughan's thugs |
| Sarah Sutton | Logopolis: 1 | Still on Traken |
| Kinda: 2 & 3 | Asleep in the Tardis | |
| Janet Fielding | Arc of Infinity: 1 | Not yet rejoined Tardis crew |
