The Great Diamond Robbery

Ambrose C. Park, left on a park bench as an infant with an impulsive need to find his parents, is an assistant to a diamond cutter. Shyster lawyer Remlick, in a strategy to get a fabulous uncut diamond through Ambrose, arranges for Emily Drummon, Duke Fargoh and Maggie Drummon to pose as Ambrose's long-lost parents and sister. The diamond, through many comic situations, is acquired and the gang is going to have Ambrose cut the diamond, and relieve him of the two stones and his parental illusions at the same time. But Maggie, who has no taste for the deception, tips Ambrose off and a wild chase ensues. At the end, Ambrose is very happy as he can now marry his "sister."

• 
  Robert Z. Leonard
• 
  Joe Nayfack
• 
  Dolph Zimmer

• 
  Red Skelton
  Ambrose C. Park
• 
  Cara Williams
  Maggie Drumman
• 
  James Whitmore
  Mr. Remlick, Lawyer
• 
  Kurt Kasznar
  Louie
• 
  Dorothy Stickney
  Emily Drumman
• 
  George Mathews
  Duke Fargoh
• 
  Reginald Owen
  Bainbridge Gibbons
• 
  Harry Bellaver
  Herb
• 
  Connie Gilchrist
  Blonde
• 
  Steven Geray
  Van Goosen
• 
  Sig Arno
  Mr. Sahutsky
• 
  G. Pat Collins
  Nightwatchman Connelly (uncredited)
• 
  Jean Fenwick
  Secretary (uncredited)
• 
  Ed Fury
  Interne (uncredited)
• 
  William Haade
  Mike, the Policeman (uncredited)
• 
  Jack Kruschen
  Cafe Counterman (uncredited)
• 
  Anna Q. Nilsson
  Nurse (uncredited)
• 
  Stuart Randall
  Nightclub Manager (uncredited)
• 
  Olan Soule
  Mr. Heinsdorfer, Gibbons' Floor Manager (uncredited)
• 
  Robert Stevenson
  Guard (uncredited)