The Beast of Yucca Flats

Tor Johnson Joseph Javorsky

Douglas Mellor Hank Radcliffe

Barbara Francis Lois Radckiffe

Bing Stafford Patrolman Jim Archer

Larry Aten Patrolman Joe Dobson

Alan Francis Mike, also called Art, Radcliffe

Ronald Francis Randy Radcliffe

Coleman Francis Narrator / Gas Station Attendant / Newspaper Customer

Anthony Cardoza KGB Driver / Fat Man in Rescue Plane

John Morrison KGB Agent with Mustache

Jim Miles Javorsky's Aide

Jim Oliphant The Stranded Motorist

Linda Bielema The Stranded Motorist's Wife

George Principe The Passing Motorist

Marcia Knight Jim's Woman (uncredited)

Graham Stafford Newsboy