Charles Lamont Director Bud Abbott Bud Alexander Actor Lou Costello Lou Francis Actor Nancy Guild Helen Gray Actor Arthur Franz Tommy Nelson Actor Adele Jergens Boots Marsden Actor Sheldon Leonard Boots Morgan Actor William Frawley Det. Roberts Actor Gavin Muir Dr. Philip Gray Actor Syd Saylor Waiter Actor Billy Wayne Rooney Actor Howard Christie Producer Robert Lees Screenwriter Frederic I. Rinaldo Screenwriter John Grant Screenwriter George Robinson Cinematographer Virgil Vogel Film Editing Bernard Herzbrun Art Director Richard H. Riedel Art Director John P. Austin Set Decoration Russell A. Gausman Set Decoration