The Whistler was the first of eight Columbia "B" thrillers based on the popular radio series of the same name. The Whistler, a shadowy (and unbilled) figure, introduced each film as he'd done on radio: "I am the Whistler...and I know many things, for I walk by night." This time the Whistler tells the strange story of despondent Richard Dix, who, believing his wife dead, hires professional killer J. Carroll Naish to put him out of his misery. Then the wife suddenly shows up...and Dix can't locate his would-be assassin. An old story with plenty of fresh new twists (for example, Naish talks of his profession as though it were a fine art like painting and sculpture), The Whistler bode well for the seven films that followed. Richard Dix starred in all but one film in the series, alternating between hero and heavy.
by Hal Erickson synopsis