Jon Pertwee
The Doctor
Caroline John
Liz Shaw / Section Leader Elizabeth Shaw
Nicholas Courtney
Brigadier Lethbridge-Stewart / Brigade Leader Lethbridge-Stewart
John Levene
Sergeant Benton / Platoon Under Leader Benton
Olaf Pooley
Professor Stahlman / Director Stahlman
Christopher Benjamin
Sir Keith Gold
Sheila Dunn
Petra Williams / Dr Petra Williams
Derek Newark
Greg Sutton
David Simeon
Private Latimer
Derek Ware
Private Wyatt
Walter Randall
Harry Slocum
Ian Fairbairn
Bromley
Roy Scammell
RSF Sentry
Keith James
Patterson
