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)

John Sturges

Director

Martin Caidin

Novel

Daniel L. Fapp

Director of Photography

Walter Thompson

Editor

M.J. Frankovich

Producer

Frank Tuttle

Set Decoration

Lyle R. Wheeler

Production Design

Donald C. Glouner

Special Effects

Lawrence W. Butler

Special Effects

W. Wallace Kelley

Second Unit Director of Photography

Les Fresholtz

Sound

Nelson Tyler

Aerial Camera

Arthur Piantadosi

Sound

John Franco

Script Supervisor

Buddy Van Horn

Stunt Double

Norman Stuart

Dialogue Coach

Daniel McCauley

Assistant Director

Frank Capra, Jr.

Associate Producer

Robie Robinson

Special Effects

Seth Banks

Costumer

William J. O'Sullivan

Production Manager

Ralph E. Black

Second Unit Director

Mayo Simon

Screenplay