The Plot Thickens Skuespillere og folkene bag
James GleasonPolice Insp. Oscar Piper Zasu PittsHildegarde Withers Owen Davis Jr.Robert Wilkins Louise LatimerAlice Stevens Richard TuckerJohn Carter Alyce ArdellJosephine, Hildegarde's Maid (uncredited) John T. BamburyMidget (uncredited) Billy DooleyGas Station Attendant (uncredited) Frank FanningDetective Fanning (uncredited) Mary GordonWoman with Bag (uncredited) Reed HowesMuseum Guard in Egyptian Room (uncredited) John IndrisanoMan in Line for Inspection (uncredited) Lew KellyCassidy, a Policeman (uncredited) John MilternMr. Gordon, Museum Guard (uncredited) Tom QuinnFirst Hatless Suspect (uncredited) Bodil RosingTheresa the Cook (uncredited) George SorelMan Threatening Carter (uncredited) Clarence Upson YoungManuskript William SistromAssocieret producer Samuel J. BriskinExecutive producer Van Nest PolglaseArt Direction Feild M. GrayArt Direction Darrell SilveraSet Decoration Nicholas MusuracaDirector Of Photography Edward StevensonCostume Design George D. EllisSound Recordist 
