Dr. David Loring
Robert Loggia
Joan Woods
Ellen Parker
Soviet Officer
Jason Johnson
Dr. Joe Freed
Phillip Pine
Ella Freed
Marilee Earle
Ella's Mother
Kitty Kelly
Narrator
Lawrence Dobkin
General Barr
Larry Kerr
CONAD Colonel
John McNamara
CONAD General
Mike Steele
The Secretary of State
Selmer Jackson
Music
Gerald Fried
Screenplay
Jerome Bixby
Director
William Berke
Producer
Lee Gordon
Cinematography
Kenneth Peach
John McPartland
Executive Producer
Supervising Film Editor
Everett Sutherland