John Ireland
— Investigator John Williams
Richard Denning
— Chief Investigator Paul Reagan
Suzanne Dalbert
— Margo Wayne
Robert Foulk
— Commander Jackson
Mike Connors
— Lt. Magrew (as Touch Conners)
Richard Avonde
— Buzz Olin
William Bryant
— FBI Agent in Montage (as William R. Klein)
Cicely Browne
— Blonde Woman
Tommy Farrell
— Agent Reynolds
Joseph Mell
— Box of Taffy Man at Penn Station
Robert Hunter
— Andy, alias Andre, an agent
Peter Marshall
— Leo Wayne