<P> 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 March 15, 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 . </P> <Ul> <Li> Marie Dompnier as Sandra Winckler </Li> <Li> Jan Hammenecker as Justin </Li> <Li> Alexandre Carrière as Fred </Li> <Li> Florence Bolufer as Melanie </Li> </Ul> <Li> Marie Dompnier as Sandra Winckler </Li> <Li> Jan Hammenecker as Justin </Li>

Where is the french tv show witnesses filmed