Batman [Bruce Wayne]; Robin [Dick Grayson]; Jack Barnes [aka Diamond Jack] (baseball tycoon); Harley Cottonworth (jewelry dealer); Mazie; Roxane Wilder; Rupert Dazel [aka The Match King]; Beetle (Dazel's butler); Eddie Hoyle (ranch owner, ex-Air Force ace); The Joker (villain); Joker's gang [Sparks; others un-named] (villains)
Synopsis
After winning a card game, the Joker decides to use his winning hand, a Royal Flush in diamonds, as the basis for a series of crimes.