The Plot Thickens

A priceless Cellini silver cup is stolen from a local museum with both Hildegarde and Oscar on the case.

• Ben HolmesDirector
• Clarence Upson YoungScreenplay
• Jack TownleyScreenplay

• James GleasonPolice Insp. Oscar Piper
• Zasu PittsHildegarde Withers
• Owen Davis Jr.Robert Wilkins
• Louise LatimerAlice Stevens
• Arthur AylesworthKendall
• Paul FixJoe
• Richard TuckerJohn Carter
• Barbara BarondessMarie
• James DonlanJim
• Agnes AndersonDagmar
• Oscar ApfelRobbins
• Alyce ArdellJosephine, Hildegarde's Maid (uncredited)