Atomic scientist/pilot Doug Martin is missing after his plane crashes on an reconnaissance mission after a nuclear test. Miraculously appearing unhurt at the base later, he is given sodium amethol, but authorities are skeptical of his story that he was captured by aliens determined to conquer the Earth with giant monsters and insects. Martin vows to use existing technology to destroy them.
Peter Graves
as Douglas Martin
Barbara Bestar
as Ellen Martin
James Seay
as Col Banks
Frank Gerstle
as Dr. Curt Kruger
Shepard Menken
as Maj. Clift
Steve Pendleton
as FBI Agent Briggs
John Frederick
as Denab / The Tala
Jack Daly
as Powerhouse Control Room Worker
Burt Wenland
as Sgt. Bandaro
Ruth Bennett
as Miss Vincent
Ron Kennedy
as M.P. Sgt Powers
Lester Dorr
as Gas Station Attendant
