- Country: USA
- Genres: Comedy, Drama, Mystery
- Release: 1936-12-11
- Director: Ben Holmes
- Writers: Clarence Upson Young , Jack Townley , Stuart Palmer
- Language: English
- Stars: James Gleason (I) (1882–1959) , Zasu Pitts , Owen Davis Jr. (1907–1949) , Louise Latimer , Arthur Aylesworth , Paul Fix , Richard Tucker , Barbara Barondess , James Donlan , Agnes Anderson
- Runtime: 69 min
- Awards: N/A
- AKA: Misterio en el museo (Spain) , O Enigma da Pérola (Brazil) , The Swinging Pearl Mystery (United Kingdom) , The Riddle of the Dangling Pearl (United States of America) , Le meurtre de John Carter (France, French Republic) , The Plot Thickens (United States of America) , The Plot Thickens , Alarmsignalen (Sweden) , Il signore e la signora Sherlock Holmes (Italy) , El detective y su compañera (Spain)
- Plot: John Carter just had one of those days. First he had an argument with a mysterious Frenchman. Then Alice wants him to pick her up at the park after she has a fight with Robert over him. So Carter takes the roadster just as Marie and Joe were getting ready to leave. But Kendall, the butler, follows the roadster as he thinks it is Joe and his girl Marie. So when Carter picks up Alice and goes out in the country to park - he is shot dead. But the next day, he is found dead in the library at home. The investigation may be run by Inspector Piper, but most of the snooping is done by Hildegarde. The Sultan's Emerald, and a picture of the Cellini Cup, may be the clue leading to Carter's killer.
- IMDB:tt0028111
The Plot Thickens Cast · · · ALL
Ben Holmes
Director
James Gleason
(I)
(1882–1959)
Oscar Piper
Zasu Pitts
Hildegarde Withers
Owen Davis Jr.
(1907–1949)
Robert Wilkins
Louise Latimer
Alice Stevens
Arthur Aylesworth
Kendall
Paul Fix
Joe
Richard Tucker
John Carter
Barbara Barondess
Marie
James Donlan
Jim
Agnes Anderson
Dagmar
Oscar Apfel
H. G. Robbins
Alyce Ardell
Josephine, Hildegarde's Maid
John T. Bambury
Midget
Billy Dooley
Gas Station Attendant
Frank Fanning
Detective Fanning
Mary Gordon
Woman with Bag
Reed Howes
Museum Guard
John Indrisano
Man in Line for Inspection
Lew Kelly
Cassidy - Policeman
John Miltern
Mr. Gordon, Museum Guard
Tom Quinn
First Hatless Suspect
Bodil Rosing
(1877–1941)
Theresa the Cook
George Sorel
Man Threatening Carter