Richard Thorpe Director Gene Kelly Giovanni E. "Johnny" Columbo Actor J. Carrol Naish Louis Lorelli Actor Teresa Celli Isabella Gomboli Actor Marc Lawrence Caesar Xavier Serpi Actor Frank Puglia Carlo Sabballera Actor Barry Kelley Police Captain Thompson Actor Mario Siletti Benny Danetta, Nino Actor Carl Milletaire George Allani, Tomasino Actor Peter Brocco Roberto Columbo Actor Eleanora Mendelssohn Maria Columbo Actor Grazia Narcio Mrs. Denetta Actor Maurice Samuels Moriani Actor Bert Freed Prosecutor Actor Mimi Aguglia Mrs. Sabballera Actor Carlo Tricoli Pietro Riago Actor Luther Davis Screenwriter William H. Wright Producer Paul Vogel Cinematographer Cotton Warburton Film Editing Alberto Colombo Original Music Cedric Gibbons Art Director Gabriel Scognamillo Art Director Charles DeCrof Set Decoration Edwin B. Willis Set Decoration Walter Plunkett Costume Design