First broadcast First broadcast 29th January 2017.
When a body is found in a marshland outside of Oxford, everyone assumes they're the remains of Oxford botanist Matthew Laxman, who disappeared near the site five years earlier.
Alex Mann - Dr. Matthew Laxman
Simon Meacock - Nigel Warren
Sheila Hancock - Dowsable Chattox
Sara Vickers - Joan Thursday
Roger Allam - DI Fred Thursday
Caroline O'Neill - Win Thursday
Shaun Evans - DC Endeavour Morse
Anton Lesser - Chief Superintendent Reginald Bright
Sean Rigby - DS Jim Strange
Dakota Blue Richards - WPC Shirley Trewlove
James Bradshaw - Dr. Max DeBryn
Natalie Burt - Alison Laxman
Michael Pennington - Professor Donald Bagley
Joanna Horton - Selina Berger
Jane Whittenshaw - Morag Morrison
Chris Coghill - Seth Chattox (as Christopher Coghill)
Emily Forbes - Ros Levin
Grahame Fox - Zebulon Sadler
Sam Hoare - Dr. Tristan Berger
Alex Wyndham - Dr. Jon Levin
Sam Redford - Sgt. Troy Martin
Phillip Edgerley - Quizmaster
Abigail Thaw - Dorothea Frazil
Adam Levy - Elliott Blake
Matthew Walker - Ray Morton
Raj Paul - Doctor
Sophie Karl - Villager - Mother of Beatrix
Stefan Kopiecki - Porter
Rita McDonald Damper - Villager
Sophie Simnett - Pippa
