Dick Tracy

Dick Tracy's foe for this serial is the crime boss and Masked Mystery Villain The Spider/The Lame One and his Spider Ring. In the process of various crimes, including using his Flying wing and sound weapon to destroy the Bay Bridge in San Francisco and stealing an experimental "Speed Plane", the Spider captures Dick Tracy's brother, Gordon. The Spider's minion, Dr. Moloch, performs a brain operation on Gordon Tracy to turn him evil, making him secretly part of the Spider Ring and so turning brother against brother.

• 
  Ray Taylor
• 
  Alan James

• 
  Ralph Byrd
  Dick Tracy
• 
  Kay Hughes
  Gwen Andrews
• 
  Smiley Burnette
  Mike McGurk
• 
  Lee Van Atta
  Junior
• 
  John Picorri
  Moloch
• 
  Carleton Young
  Gordon Tracy, after
• 
  Fred Hamilton
  Steve Lockwood
• 
  Francis X. Bushman
  Chief Clive Anderson
• 
  John Dilson
  Ellery Brewster [Chs. 1, 12
• 
  Richard Beach
  Gordon Tracy, before [Chs. 1, 12
• 
  Byron Foulger
  Korvitch [Chs. 1, 12]
• 
  Roscoe Gerald
  Power Co. Watchman-Thug (uncredited)