Henry Hathaway Director Paul Douglas Ofcr. Charlie Dunnigan Actor Richard Basehart Robert Cosick Actor Barbara Bel Geddes Virginia Foster Actor Debra Paget Ruth Actor Agnes Moorehead Christine Hill Cosick Actor Robert Keith Paul E. Cosick Actor Howard Da Silva Deputy Police Chief Moskar Actor Jeffrey Hunter Danny Klempner Actor Martin Gabel Dr. Strauss Actor Grace Kelly Mrs. Louise Ann Fuller Actor Frank Faylen Walter, room service waiter Actor Jeff Corey Sgt. Farley Actor Donald Randolph Dr. Benson Actor Willard Waterman Mr. Harris Actor Kenneth Harvey Police Operator (uncredited) Actor John Cassavetes Bit Part (uncredited) Actor Ossie Davis Cab driver (uncredited) Actor Russell Hicks Regan, Hotel Manager (uncredited) Actor Brian Keith Extra (uncredited) Actor Harvey Lembeck Cab driver (uncredited) Actor Joyce Van Patten Barbara, Ruth's friend (uncredited) Actor James Warren Thomas Edward Fuller (uncredited) Actor John Paxton Screenwriter Joel Sayre Screenwriter Sol C. Siegel Producer Joseph MacDonald Cinematographer Dorothy Spencer Film Editing Leland Fuller Art Director Alfred Newman Original Music Lyle R. Wheeler Art Director Thomas Little Set Decoration Fred J. Rode Set Decoration Charles Le Maire Costume Design Edward Stevenson Costume Design