Cast
Tommy Kirk
Walter Talbot
Tom Tryon
Capt. Richmond Talbot
Dany Saval
Lyrae
Harp McGuire
Federal Security Driver, Federal Security Driver (uncredited)
Nelson Olmsted
Police Officer Dennis (uncredited)
Jeffrey Sayre
Conventioneer in Hotel Lobby (uncredited)
Kent Smith
Secretary of the Air Force
Jo Anne Worley
Beatnik Girl in Lineup (uncredited)
Edmond O'Brien
McClosky aka 'Mac'
Douglas Evans
Colonel (uncredited)
John Holland
Joe McCord (uncredited)
Arthur Tovey
Conventioneer in Hotel Lobby (uncredited)
John Zaremba
Security Officer Conducting Lineup (uncredited)
Sally Field
Beatnik Girl in Lineup (uncredited)
Simon Scott
Medical Officer
Brian Keith
Maj. Gen. John M. Vanneman
Nancy Kulp
Nutritionist Officer, Space Flight Nutritionist (uncredited)
Bert Remsen
Brennan
Muriel Landers
Fat Lady (uncredited)
Karen Norris
Bridge Player (uncredited)
Guy Wilkerson
Conventioneer in Elevator (uncredited)
Sarah Selby
Mrs. Talbot
Bob Hastings
Motorist (uncredited)
Kenner G. Kemp
Conventioneer in Hotel Lobby (uncredited)
Robert Brubaker
Space Flight Technician (uncredited)
Bob Sweeney
Sen. Henry McGuire