The Doctor - Patrick Troughton
Jamie - Frazer Hines
Zoe - Wendy Padbury
Lieutenant Carstairs - David Savile
Lady Jennifer Buckingham - Jane Sherwin
General Smythe - Noel Coleman
Commandant Gorton - Richard Steele
Major Barrington - Terence Bayler
Captain Ransom - Hubert Rees
Lieutenant Crane - David Valla
Sgt. Major Burns - Esmond Webb
Sergeant Willis - Brian Forster
Military Policeman - Pat Gorman
Military Chauffeur - Peter Stanton
Von Weich - David Garfield
Lieutenant Lucke - Gregg Palmer
German Soldier - John Livesey
German Soldier - Bernard Davies
War Lord - Philip Madoc
War Chief - Edward Brayshaw
Security Chief - James Bree
Chief Scientist - Vernon Dobtcheff
Alien Guard - John Atterbury
Alien Technician - Charles Pemberton
Sgt. Thompson - Bill Hutchinson
Corporal Riley - Terry Adams
Leroy - Leslie Schofield
Harper - Rudolph Walker
Spencer - Michael Lynch
Russell - Graham Weston
Moor - David Troughton
Du Pont - Peter Craze
Arturo Villar - Michael Napier-Brown
Petrov - Stephen Hubay
Redcoat - Tony McEwan
First Time Lord - Bernard Horsfall
Second Time Lord - Trevor Martin
Third Time Lord - Clyde Pollitt
Tanya - Clare Jenkins