All Cast
Jon Pertwee
The Doctor
Caroline John
Liz Shaw
Nicholas Courtney
Brigadier Lethbridge-Stewart
Hugh Burden
Channing
Hamilton Dyce
Major General Scobie
Antony Webb
Dr. Henderson
Neil Wilson
Seeley
Talfryn Thomas
Mullins
John Breslin
Captain Munro
John Woodnutt
Hibbert