Two federal agents do not believe an atomic-bomb threat is just another war game.

John Ireland
as Investigator John Williams

Richard Denning
as Chief Investigator Paul Reagan

Suzanne Dalbert
as Margo Wayne

Robert Foulk
as Commander Jackson

Mike Connors
as Lt. Magrew (as Touch Conners)

Richard Avonde
as Buzz Olin

William Bryant
as FBI Agent in Montage (as William R. Klein)

Cicely Browne
as Blonde Woman

Tommy Farrell
as Agent Reynolds

Joseph Mell
as Box of Taffy Man at Penn Station