Forensic Files, originally known as Medical Detectives, is an American documentary television program that reveals how forensic science is used to solve violent crimes, mysterious accidents, and outbreaks of illness. The show was originally broadcast on TLC. It is narrated by Peter Thomas, produced by Medstar Television, and distributed by FilmRise, in association with truTV Original Productions. It broadcast 406 episodes from its debut on TLC in 1996 until its final episode in 2011. Reruns shown on HLN were initially retitled Mystery Detectives before settling on the main title of the show in 2014.

Peter Addenbrooke Thomas was an American announcer and narrator of television programs and advertisements. Possessing a "smooth and silky baritone" voice, Thomas enjoyed a career spanning more than 70 years, and was best known as the narrator of the television series Forensic Files.