Edward Arnold

Nero Wolfe

Lionel Stander

Archie Goodwin

Dennie Moore

Mazie Gray

Victor Jory

Claude Roberts

Nana Bryant

Sarah Barstow

Joan Perry

Ellen Barstow

Russell Hardie

Manuel Kimball

Walter Kingsford

Emanuel Jeremiah (E.J.) Kimball

Boyd Irwin

Prof. Edgar Barstow

John Qualen

Olaf

Gene Morgan

Det. Lt. O'Grady

Rita Hayworth

Marie Maringola

Frank Conroy

Dr. Nathaniel Bradford

Juan Torena

Carlo Maringola

Martha Tibbetts

The Apartment House Maid

Henry Roquemore

Minor Role (uncredited)

Eddy Waller

Golf Starter (uncredited)