- Tim Healy - DCI Duggan
- Kevin Whately - Nigel Liddy
- Tara Fitzgerald - Elizabeth Morton
- James McAvoy - Martin Vosper
- Nick Reding - Scott Martin
- Jake Wood - Karl Kruger
- Annette Crosbie - Rose Buttimore
- Raji James - Anthony
- Neil Morrissey - Stephen Kite
- Reece Dinsdale - Michael Davies
- Jonathan Timmins - Andrew Brody
- Diana Rigg - Jill Craig
- David Suchet - Edward Palmer
- Gillian Kearney - Catrin Palmer
- Chiwetel Ejiofor - DS McCorkindale
- Steve McFadden - Joe Waterman
- Keith Allen - James Napeworth
- Sharon Maiden - Sandra Waterman
- Ryan Philpott - Angus Thompson
- Timothy West - Dr. William Collins
- Judy Parfitt - Margaret Collins
- John Gordon Sinclair - D.S. Paul Bannister
- Michael Medwin - Dr. Patrick Whitfield
- Ian Kelsey - Liam Taylor
- Tom Goodman-Hill - David
- Archie Panjabi - WPC Jill Evans
- Caroline Goodall - Joanna Liddy
- John Thomson - Alan Squires
- Denise Van Outen - Debra Squires
- Scott Chisholm - Craig Squires
- Keeley Hawes - Deborah
- Scot Williams - David
- Ed Stoppard - James Hillier
- Ginny Holder - Caroline
- Pauline Quirke - Jane Saunders
- Mark Womack - Stephen Croft
- Lucy Davis - Kerry
- Rob Brydon - Barry Coates
- Geraldine Somerville - Angela Coates
- Steven Pacey - Alex Cunningham
- Neil Dudgeon - Edward Buttimore
- Maggie O'Neill - Samantha Johnstone
- Nigel Havers - Nicholas Chadwick QC
- Susan Gilmore - Helen Chadwick
- Art Malik - Paul Asher
- Jamie Foreman - Stuart Jackson
- Patsy Kensit - Angela Stephenson
- David Hemmings - Judge James Hendon
- Neil Pearson - Stuart Wilsher
- Nicholas Hoult - Andrew Wilsher
- Dennis Waterman - Ken Grendle
- James Wilby - Daniel Morton / Sir Richard Morton
- Gary Kemp - Jamie Holt
- Gaynor Faye - Alyson Holt
- Phil Davis - Chaz Hadley
- Natasha Little - Hat Vezey
- Jamie Theakston - Simon Talbot
- Adam Faith - Terry Cameron
- Nicholas Lyndhurst - Alan Willis
- Helen Baxendale - Helen Robbins
- Adrian Dunbar - Tom Robbins
- Colin Salmon - Alex Treeve
- Jacqueline Clarke - Mrs. Powell
Jamie Foreman interpreta a Stuart Jackson en la serie.
Nicholas Hoult interpreta a Andrew Wilsher en la serie.
Capítulo disponible en las siguientes plataformas:
