Max Nosseck Director John Loder Reginald Parker, Edward Grey Actor June Duprez April Manby Carson Actor Michael St. Angel Lt. Bob Carson Actor Miles Mander Chief Inspector W.R. Allison Actor Rose Hobart Dorothy Kent Actor Gilbert Emery Dr. Manby Actor Rex Evans Leslie Shelton Actor Matthew Boulton Inspector Graham Actor Olaf Hytten Banks Actor Lydia Bilbrook Mrs. Manby Actor Ian Wolfe Lord Mayor Herman Brandon R. Clive Actor Herman Schlom Producer