George Sanders
Gen. Armstrong
Acting
Maurice Evans
Dr. Matthews / Alien
Acting
Patrick Allen
Bob Megan
Acting
Neil Connery
Jim Radford
Acting
Robert Flemyng
W.C. Baldwin
Acting
Pamela Conway
Lorna
Acting
Allan Cuthbertson
Hindsmith
Acting
Michael Culver
Lt. Bailes
Acting
Sally Faulkner
Joanna
Acting
Shelagh Fraser
Mrs. Thatcher
Acting
Hilary Dwyer
Julie Slade
Acting
Dennis Chinnery
Control Officer
Acting