Witnesses (French: Les Témoins) is a French police procedural television series, created by Marc Herpoux and Hervé Hadmar, that premiered in Belgium on La Une on 22 November 2014. Set in the coastal town of Le Tréport in Normandy, France, police detectives Sandra Winckler (Marie Dompnier) and Justin (Jan Hammenecker) investigate when bodies of murder victims are unearthed and left for discovery in the show homes of a housing developer. Former chief-of-police, Paul Maisonneuve (Thierry Lhermitte), is implicated. This series was later broadcast in France on France 2 from 8 March 2015, and from 1 May 2015 Netflix began streaming a subtitled version in the United States. Channel 4 broadcast the series in the United Kingdom from 22 July 2015.

Marie Dompnier won a Golden FIPA award for the best actress in a television series at 2015's Biarritz International Festival of Audiovisual Programming for her role as Sandra Winckler. In March 2016, France 2 announced a second series was in production. This series premiered in France on 15 March 2017. Sandra and Justin find themselves on the trail of a serial killer whose modus operandi is to murder all former lovers of his kidnap victims. Audrey Fleurot and Judith Henry joined the cast. In the UK, this series was broadcast on BBC Four from 25 November 2017.