Characters played by Tom Tryon
Capt. Richmond Talbot
Characters played by Brian Keith
Maj. Gen. John M. Vanneman
Characters played by Edmond O'Brien
McClosky - aka 'Mac'
Characters played by Dany Saval
Lyrae
Characters played by Bob Sweeney
Sen. Henry McGuire
Characters played by Kent Smith
Secretary of the Air Force
Characters played by Tommy Kirk
Walter Talbot
Characters played by Simon Scott
Medical Officer
Characters played by Bert Remsen
Agent Brown
Characters played by Sarah Selby
Mrs. Celia Talbot
Characters played by Dick Whittinghill
Col. Briggs
Characters played by Robert Brubaker
Space Flight Technician
Characters played by Walt Davis
Air Force Officer
Characters played by Douglas Evans
Colonel
Characters played by Sally Field
Beatnik Girl in Lineup
Characters played by Michael Garrett
Control Board Technician
Characters played by Bob Hastings
Motorist
Characters played by Jonathan Hole
Hotel Clerk
Characters played by John Holland
Joe McCord
Characters played by William Hudson
Space Flight Technician
Characters played by Kenner G. Kemp
Conventioneer in Hotel Lobby
Characters played by Nancy Kulp
Space Flight Nutritionist
Characters played by Muriel Landers
Fat Lady
Characters played by Harp McGuire
Federal Security Driver
Characters played by Karen Norris
Bridge Player
Characters played by Nelson Olmsted
Police Officer Dennis
Characters played by Jeffrey Sayre
Conventioneer in Hotel Lobby
Characters played by Bert Stevens
Conventioneer in Hotel Lobby
Characters played by Chet Stratton
Captain
Characters played by Arthur Tovey
Conventioneer in Hotel Lobby
Characters played by Guy Wilkerson
Conventioneer in Elevator
Characters played by Jo Anne Worley
Undetermined Minor Role
Characters played by John Zaremba
Security Officer Conducting Lineup