A priceless Cellini silver cup is stolen from a local museum with both Hildegarde and Oscar on the case.
as Police Insp. Oscar Piper
as Hildegarde Withers
as Robert Wilkins
as Alice Stevens
as Kendall
as Joe
as John Carter
as Marie
as Jim
as Dagmar
as Robbins
as Josephine, Hildegarde's Maid (uncredited)
as Midget (uncredited)
as Gas Station Attendant (uncredited)
as Detective Fanning (uncredited)
as Woman with Bag (uncredited)
as Museum Guard in Egyptian Room (uncredited)
as Man in Line for Inspection (uncredited)
as Cassidy, a Policeman (uncredited)
as Mr. Gordon, Museum Guard (uncredited)
as First Hatless Suspect (uncredited)
as Theresa the Cook (uncredited)
as Man Threatening Carter (uncredited)
The Penguin Pool Murder
Murder on the Blackboard
Murder on a Honeymoon
Murder on a Bridle Path
The Plot Thickens
Forty Naughty Girls