Ralph Bellamy made his fourth and final appearance as literary sleuth Ellery Queen in Columbias Ellery Queen and the Murder Ring. On this occasion, Ellery and his police-inspector father (Charley Grapewin) are summoned to a private hospital by its owner, philanthropist Mrs. Stack (Blanche Yurka). Thereve been some very weird goings-on at the hospital as of late, and Mrs. Stack wants to get to the bottom of things.