The Whistler is a haunting American radio series that follows an unseen narrator who seems to revel in watching murders happen and telling the grim stories that follow. The Whistler, who does not use a surname and evades capture, stays hidden in the criminal underworld, observing evildoers carry out their schemes without them noticing. The show's tone and style center around gritty crime stories and mystery, wherein the killer is often punished by a twist of fate that only The Whistler seems to expect.

The series aired from May 1942 until September 1955 on the west-coast regional CBS Radio Network and later on Armed Forces Radio. Episodes were also broadcast in Chicago, with two short-lived attempts at east-coast broadcasts sponsored by Campbell Soup Company and Household Finance. There were a total of 692 episodes, out of which over 200 no longer exist today. The show was adapted into a film noir series by Columbia Pictures in 1944 and a television series in 1954. Some notable actors who lent their voices to the series include Bill Forman, Marvin Miller, Gale Gordon, Joseph Kearns, and many others.

Sources: archive.org, wikipedia.org, otrcat.com