First broadcast 16th/17th January 2017.
Lorna Katz's body is pulled from the Thames and DI Heather Ashton hauls in Kieran Vale, the boyfriend Lorna dumped but wanted to get back with.
Emilia Fox - Dr. Nikki Alexander
David Caves - Jack Hodgson
Richard Lintern - Dr. Thomas Chamberlain
Liz Carr - Clarissa Mullery
Edward Bourne - Young Ben Logan (as Edward Richards)
Bartley Burke - Shaun Cohen
Tom Carter - Young Aaron Logan
Harris Dickinson - Aaron Logan
Lewis Griffin - Kieran Vale (as Lewis Griffith)
Mufrida Hayes - Jean
Ty Hurley - CID
Melissa James - Zoe
Kate McLaughlin - Ruth Tresize
Rhoda Ofori-Attah - Stella Tuffour
Eva Pope - DI Heather Ashton
Claire Rafferty - Sarah Logan
Nav Sidhu - DS Carl Pope
Sarah Smart - Ali Tresize
Saria Steyl - Natasha Hill (as Saria Steel)
Jo Stone-Fewings - Chris Tresize
Morgan Watkins - Ben Logan
Alya Elouissi - Passerby
Robert Styles - Malcolm Glasgow
Janette Sharpe - Prison Officer
