Barrett
Morgan
Mr. Thompson
Axelrod
Herr Lüdemann
Admiral Norman Henshaw
Mak
Captain Ricky
Capt. Ronald Rogers
Dr. Rodney Masters
Louw's Father
Major Ellis
Dr. Leon Walters
James Sullivan (as Brian O'Shaugnessy)
Maj. Allen Wilson
'Barracuda' Skipper
Maj. Smith R.A.
Father Shannon
Professor Morton
John Enrlich
Colonel Duncan
Pilot
Dr. Page
Mackenzie
Col. van Vuuren
Andrew Murdock
Richard
Col. Bretyn
Macarthy
Alec Dudley
Dr. Hermann Kummerow
Smidson
Jan Greyling
Piet Brügge