Cast
- Sylvester McCoy (The Doctor)
- Tracey Childs (Elizabeth Klein)
- Adrian Bower (Steffen / The Authority)
- Hannah Smith (Rose / The Vrill)
- Evie Dawnay (Lilly / The Vrill)
- Mark Donovan (Jackson / The Watcher)
- Alex Mallinson (The Carrion)
- Rupert Wickham (Faber / Butterfly)
- Anneke Wills (Polly Wright)
- Nicholas Courtney (Sir Alistair Lethbridge-Stewart)
- John Pickard (Thomas Brewster)
- Russell Floyd (Gerry Lenz)
- Paul McGann (Johann Schmidt)
Doctor Who - The Monthly Adventures
131. Doctor Who: Survival of the Fittest
Written by Jonathan Clements John Ainsworth Lee Mansfield Marc Platt
Starring Sylvester McCoy Tracey Childs
