Blackmail is a 1947 American film noir crime film directed by Lesley Selander and starring William Marshall, Adele Mara and Ricardo Cortez.^[1] The lead character is based on a pulp magazine hero Dan Turner, Hollywood Detective.

A shamus is approached by an entertainment executive to stop a blackmail plot against him.

• William Marshall as Dan Turner
• Adele Mara as Sylvia Duane
• Ricardo Cortez as Ziggy Cranston
• Grant Withers as Police Inspector Donaldson
• Stephanie Bachelor as Carla
• Richard Fraser as Antoine le Blanc
• Roy Barcroft as Spice Kellaway
• George J. Lewis as Blue Chip Winslow
• Gregory Gaye as Jervis
• Tristram Coffin as Pinky
• Eva Novak as Mamie, the Maid
• Bud Wolfe as Gomez
• Tom London as Tom (uncredited)
• Ben Welden as Bartender (uncredited)

When released The New York Times critic gave the film a mixed review, writing, "Evidently the writers and/or Republic, the manufacturer, were convinced that some fast dialogue would enhance the rather confused goings on. But this yarn about a California playboy who becomes involved with shakedown artists and is aided by a brash, private investigator needed more than an occasional bright quip to keep things clear and moving."^[2]