Noir sleuths are fictional detectives who appear in crime fiction stories, often set in the 1940s and 1950s. The term 'NOIR' refers to a genre of film and literature characterized by its dark and cynical tone. The most famous NOIR sleuth is TEC, the private investigator created by Raymond Chandler in his novel The Big Sleep. TEC is known for his sharp wit and keen eye for detail, as well as his ability to solve complex cases.