Gregory Peck
Charles Keith
Acting
Richard Crenna
Jim Pruett
Acting
David Janssen
Ted Dougherty
Acting
James Franciscus
Clayton Stone
Acting
Gene Hackman
Buzz Lloyd
Acting
Lee Grant
Celia Pruett
Acting
Nancy Kovack
Teresa Stone
Acting
Mariette Hartley
Betty Lloyd
Acting
Scott Brady
Public Affairs Officer
Acting
Frank Marth
Air Force Systems Director
Acting
Craig Huebing
Flight Director
Acting
John Carter
Flight Surgeon
Acting
Vincent Van Lynn
Aerospace Journalist
Acting
George Gaynes
Mission Director
Acting
Tom Stewart
Houston Cap Com
Acting
Duke Hobbie
Air Force Titan Specialist
Acting
Walter Brooke
Network Commentator
Acting
Dennis Robertson
Launch Director
Acting
Kenner G. Kemp
Guest in Observation Room (uncredited)
Acting