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.
as Dave Pomeroy
as Dr. Paula Stevens
as James Kincade
as August Best
as Myra Pryor
as Dr. Paul Cerbo
as Steadman
as Goff
as Ernest
as Dr. Milton Becker
as Hal Johnson
as Dick Blaine
as Albert
as Reporter
as Information Clerk
as Lt. Brady
as Karl Sinden (Mr. X)
