as Mike Connors
as Dr. Nancy Burnham
as Keach
as Sid Bream
as Diane Cafferty
as Simpkins
as Sgt. Tulley
as Alan Stanton
as MP 1
as MP 2
as Steve Elkins
as Dr. Shoup
as Chelsea
as General Cartwright
as Chambers (Head of NASA)
as Gonzales
as Sheriff Morgan
as Deputy Ferguson
as Mr. Norton
as Crewman Terrance
as Crewman Miller
as Local Man
as Girl by Pool (uncredited)
as Crewman Mitchell