This adaptation of an Ellery Queen mystery concerns the theft of a rare Chinese stamp (the Mandarin of the title), which takes place in a hotel with several shifty characters and a hysterical manager (the priceless Franklin Pangborn). The mystery, such as it is, concerns both the stamp theft and two murders, and shows Ellery and his father, the Inspector, as a team coming together enough to solve the case.(Black and white, Approx. 52:41). . .