First broadcast 4th/5th October 2021.
Nikki's students make an alarming discovery while dissecting a body donated for their training.
Ryan Hawley - Michael Robson
India Eva Rae - Amrita Naidu
David Birrell - Dr. Young
Pauline McLynn - Mary Thorpe
Nicholas Woodeson - Derek Galton
Amanda Boxer - Kate Vellecott
Siân Phillips - Beattie Elleston
Emilia Fox - Dr. Nikki Alexander
Mitesh Soni - Henry
Jack Bandeira - Ollie
Millicent Wong - Ana
David Caves - Jack Hodgson
Genesis Lynea - Dr. Simone Tyler
Bronwyn James - Hannah Robson
Stephen Wight - DS Steve Galloway
Annette McLaughlin - Liz
Richard Durden - Conor Hodgson
Sutara Gayle - Gloria Mason-Walker
Oliver Devoti - Lt. Jamie Gatley
Amanda Burton - Professor Sam Ryan
