Ellery Queen and the Murder Ring

Ralph Bellamy made his fourth and final appearance as literary sleuth Ellery Queen in Columbia's 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). There've been some very weird goings-on at the hospital as of late, and Mrs. Stack wants to get to the bottom of things. (allmovie.com)