Barbara Anderson as Carla Stanley

Bert Convy as Tim Vernon

Peter Graves as Paul Whitley

Lorne Greene as Marshall Cole

Season Hubley as Anne Redding

Tina Louise as Mae

George Maharis as Les Phillips

Burgess Meredith as Willy Basset

Doug McClure as Hank Fairbanks

Martin Milner as Lyle Kingman

Brock Peters as Dr. Ralph Therman

Robert Reed as Captain Jim Walsh

Susan Strasberg as Nancy Kingman

Misty Rowe as Angela Garland

Billy Crystal as David

John de Lancie as Bob Connors

Regis Philbin as Harry Carter

Robert Ito as Flight Engineer Roy Nakamura

Tom Stewart as Eric Brent

Sherwood Price as Mickey

Paul Napier as Eddy

Tim Pelt as Linus

Alain Patrick as Controller Girard

Richard Derr as Governor Stensky

Ric Carrott as Reporter

Shawn Randall as Passenger

Walter Maslow as Passenger