크레딧 출연 Ralph Bellamy Ellery Queen Margaret Lindsay Nikki Porter Charley Grapewin Insp. Queen Mona Barrie Nurse Marian Tracy Paul Hurst Page James Burke Sgt. Velie Leon Ames John Stack George Zucco Dr. Edwin L. Jannery Blanche Yurka Mrs. Augusta Stack Charlotte Wynters Miss Fox Tom Dugan Lou Thomas Olin Howland Dr. Williams Dennis Moore Dr. Dunn Jean Fenwick Alice Stack Pierre Watkin Crothers Byron Foulger Hospital Orderly (uncredited) 스텝 Eric Taylor Writing Gertrude Purcell Writing Manfred Lee Writing Frederic Dannay Writing James S. Brown Jr. Camera James P. Hogan Directing