Knock on Wood

Ventriloquist Jerry Morgan has failed with another love affair. The reason: when the relationship reaches the point when it is time to discuss marriage, his two dolls become mean and jealous. Morgan's dollmaker Papinek is a member of a spy ring who has stolen the secret plans for the top-secret Lafayette airplane. Since Morgan is leaving for Zurich the same night, he decides to hide the secret plan in the heads of the dolls.

• 
  Melvin Frank
• 
  Norman Panama

• 
  Danny Kaye
  Jerry Morgan
• 
  Mai Zetterling
  Ilse Nordstrom
• 
  Torin Thatcher
  Godfrey Langston
• 
  David Burns
  Marty Brown
• 
  Leon Askin
  Laslo Gromeck
• 
  Abner Biberman
  Maurice Papinek
• 
  Gavin Gordon
  Car Salesman
• 
  Otto Waldis
  Brodnik
• 
  Steven Geray
  Doctor Kreuger
• 
  Diana Adams
  Princess Maya
• 
  Patricia Denise
  Mama Morgan
• 
  Virginia Huston
  Audrey Greene
• 
  Paul England
  Chief Inspector Wilton
• 
  Johnstone White
  Langston's Secretary
• 
  Henry Brandon
  Trenchcoat Man #2
• 
  Lewis Martin
  Inspector Cranford
• 
  Patrick Aherne
  Reporter (uncredited)
• 
  Leon Alton
  Bellhop (uncredited)
• 
  John Alderson
  English Bobby (uncredited)
• 
  Patrick Whyte
  English Butler (uncredited)