Test space rockets exploding at liftoff and increased reporting of UFO sightings culminate in a direct attempt by alien survivors of a dead, extra-galactic civilization to invade Earth from impervious flying saucers, using ray-weapons of mass destruction.
Hugh Marlowe
Joan Taylor
Donald Curtis
Morris Ankrum
Thomas Browne Henry
Grandon Rhodes
John Zaremba
Paul Frees
Frank Wilcox
Sydney Mason
Larry J. Blake
Bert Stevens
Forbes Murray
Arthur Tovey
Alan Wells
Nicky Blair
Jimmy Cross
Jack Deery
Charles Evans
Raoul Freeman
Paul Frees
James Gonzalez
Duke Green
Ed Haskett
Clark Howat
Harry Lauter
Don Marlowe
William Meader
Sol Murgi
Forbes Murray
William J. O'Brien
Murray Pollack
Mike Ragan
Alan Reynolds
Dale Van Sickel
Guy Way
Bob Whitney
Frank Wilcox
Beal Wong
William Woodson