Charles Keith
Gregory Peck
Jim Pruett
Richard Crenna
Flight Director
Craig Huebing
Flight Surgeon
John Carter
Aerospace Journalist
Vincent Van Lynn
Mission Director
George Gaynes
Houston Cap Com
Tom Stewart
Air Force Titan Specialist
Duke Hobbie
Network Commentator
Walter Brooke
Launch Director
Dennis Robertson
Guest in Observation Room (uncredited)
Kenner G. Kemp
Ted Dougherty
David Janssen
Clayton Stone
James Franciscus
Buzz Lloyd
Gene Hackman
Celia Pruett
Lee Grant
Teresa Stone
Nancy Kovack
Betty Lloyd
Mariette Hartley
Public Affairs Officer
Scott Brady
Air Force Systems Director
Frank Marth
Director of Photography
Daniel L. Fapp
Stunt Double
Buddy Van Horn
Director
John Sturges
Novel
Martin Caidin
Editor
Walter Thompson
Producer
M.J. Frankovich
Set Decoration
Frank Tuttle
Production Design
Lyle R. Wheeler
Special Effects
Donald C. Glouner
Lawrence W. Butler
Second Unit Director of Photography
W. Wallace Kelley
Sound
Les Fresholtz
Aerial Camera
Nelson Tyler
Arthur Piantadosi
Script Supervisor
John Franco
Dialogue Coach
Norman Stuart
Assistant Director
Daniel McCauley
Associate Producer
Frank Capra, Jr.
Robie Robinson
Costumer
Seth Banks
Production Manager
William J. O'Sullivan
Second Unit Director
Ralph E. Black
Screenplay
Mayo Simon