Marooned

Gregory Peck

Charles Keith

Richard Crenna

Jim Pruett

David Janssen

Ted Dougherty

James Franciscus

Clayton Stone

Gene Hackman

Buzz Lloyd

Lee Grant

Celia Pruett

Nancy Kovack

Teresa Stone

Mariette Hartley

Betty Lloyd

Scott Brady

Public Affairs Officer

Frank Marth

Air Force Systems Director

Craig Huebing

Flight Director

John Carter

Flight Surgeon

Vincent Van Lynn

Aerospace Journalist

George Gaynes

Mission Director

Tom Stewart

Houston Cap Com

Duke Hobbie

Air Force Titan Specialist

Walter Brooke

Network Commentator

Dennis Robertson

Launch Director

Kenner G. Kemp

Guest in Observation Room (uncredited)