- Frazer Hines - Jamie McCrimmon
- Wendy Padbury - Zoe Heriot
- Colin Baker - The Doctor
- Nicola Bryant - Peri Brown
- Katy Manning - Jo Jones
- Daniel Anthony - Clyde Langer
- Peter Purves - Steven Taylor
- Maureen O'Brien - Vicki Pallister
- Sylvester McCoy - The Doctor
- Sophie Aldred - Ace
- William Hartnell - The Doctor
- Peter Butterworth - The Monk
- Alethea Charlton - Edith
- Peter Russell - Eldred
- Michael Miller - Wulnoth
- Michael Guest - Saxon Hunter
- Norman Hartley - Ulf
- Geoffrey Cheshire - Vicking Leader
- Ronald Rich - Gunnar the Giant
- Patrick Troughton - The Doctor
- Hamish Wilson - Jamie McCrimmon
- John Atterbury - Robot
- Ralph Carrigan - Robot
- Bill Wiesener - Robot
- Bernard Horsfall - A Stranger / Gulliver
- Barbara Loft - Child
- Sylvestra Le Touzel - Child
- Timothy Horton - Child
- Christopher Reynalds - Child
- David Reynalds - Child
- Martin Langley - Child
- Paul Alexander - Soldier
- Ian Hines - Soldier
- Richard Ireson - Soldier
- Philip Ryan - Redcoat
- Christine Pirie - Princess Rapunzel
- Sue Pulford - The Medusa
- Christopher Robbie - Karkus
- John Greenwood - D'Artagnan / Sir Lancelot
- David Cannon - Cyrano
- Gerry Wain - Blackbeard
- Martin Jarvis - Governor
- Nabil Shaban - Sil
- Nicolas Chagrin - Quillam
- Jason Connery - Jondar
- Forbes Collins - Chief Officer
- Stephen Yardley - Arak
- Sheila Reid - Etta
- Geraldine Alexander - Areta
- Graham Cull - Bax
- Owen Teale - Maldak
- Keith Skinner - Rondel
- Jon Pertwee - The Doctor
- Nicholas Courtney - Brigadier Lethbridge-Stewart
- John Levene - Sergeant Benton
- Rex Robinson - Dr. Tyler
- Roy Purcell - President of the Council
- Laurie Webb - Mr. Ollis
- Clyde Pollitt - Chancellor
- Graham Leaman - Time Lord
- Denys Palmer - Corporal Palmer
- Stephen Thorne - Omega
- Dinsdale Landen - Dr. Judson
- Alfred Lynch - Commander Millington
- Nicholas Parsons - The Rev. Mr. Wainwright
- Peter Czajkowski - Sergeant Prozorov
- Marek Anton - Vershinin
- Joann Kenny - Jean
- Joanne Bell - Phyllis
- Janet Henfrey - Miss Hardaker
- Stevan Rimkus - Captain Bates
- Marcus Hutton - Sergeant Leigh
- Christien Anholt - Perkins
- Cory Pulman - Kathleen Dudman
- Anne Reid - Nurse Crane
- Raymond Trickett - Ancient Haemovore
- Ncuti Gatwa - The Doctor (15)
- Millie Gibson - Ruby Sunday
- Tom Baker - The Doctor (4)
- Elisabeth Sladen - Sarah Jane Smith
- Peter Davison - The Doctor
- Janet Fielding - Tegan Jovanka
- Matthew Waterhouse - Adric
- Sarah Sutton - Nyssa
- James Warwick - Scott
- Clare Clifford - Kyle
- Steve Morley - Walters
- Suzi Arden - Snyder
- Ann Holloway - Mitchell
- Anne Clément - First trooper
- Mark Straker - Second trooper
- David Banks - Cyber Leader
- Mark Hardy - Cyber Lieutenant
- Beryl Reid - Briggs
- June Bland - Berger
- Alec Sabin - Ringway
- Mark Fletcher - First Crew Member
- Christopher Whittingham - Second Crew Member
- Gabriel Woolf - Sutekh
- Dave Anderson - Sven
- Ines Mayorga
- Julie Gardner
- Phil Collinson
- Andy Pryor
- Scott Handcock
- Joel Collins
- Jane Tranter
- Sam Watts
Capítulo disponible en las siguientes plataformas:
