Lynne OvermanPeter Harris Dorothy PetersonMary Harris Delmar WatsonRobert 'Butch' Harris J. Carrol NaishHenry Rice Anthony QuinnMack McGloyne Lu MillerVirgie, the housekeeper Tommy BuppG-Men Club Treasurer Sonny BuppSmallest G-Men Club Member John HamiltonPolice Commissioner Buster CrabbeJames Flowers George DavisWaiter-Witness Dick RichHouse Henchman Who Shoots Mary ParkerYoung woman at party (uncredited) John ElliottChief of Detectives John HartYoung Man at Party Mitchell IngrahamChief of Homicide Laurie LaneYoung Woman at Party Ivan MillerPolice Captain Howard M. MitchellDoorman Mary ParkerYoung Woman at Party Ruth RogersYoung Woman at Party Zeffie TilburyFlower Woman Janet WaldoYoung Woman at Party William R. LipmanSchrijver Franz BachelinArt Direction Victor MilnerDirector Of Photography Joe LefertAssistant Director