An American agent is assigned to track down a renegade Soviet spy who is building an atomic device in Los Angeles and plans to destroy the city with it.
Dave Pomeroy
Dr. Paula Stevens
James Kincade
August Best
Myra Pryor
Dr. Paul Cerbo
Steadman
Goff
Ernest
Dr. Milton Becker
Hal Johnson
Dick Blaine
Albert
Reporter
Information Clerk
Lt. Brady
Karl Sinden (Mr. X)