- Geoffrey Palmer - Lord Scarman
- John Bowe - Ralph Jarvis
- Sara Stewart - Gaynor Mason
- Amelia Bullmore - Caroline Price
- Jeremy Clyde - Chief Super
- Matthew Macfadyen - Gil Hollis
- Roy Skelton - Zippy (voice) / George (voice)
- Roger Allam - Charlie Mackintosh
- Adrian Dunbar - Martin Summers
- Perry Millward - Peter Drake
- Stephen Campbell Moore - Evan White
- Joseph Long - Luigi
- Terry Wogan - Terry Wogan (voice)
- Peter Dickson - Advert Voice (voice)
- Ruth Millar - Jackie Queen
- Adrian Schiller - Ralph's Lawyer
- Asa Butterfield - Donny
- Thomas Lockyer - Eric Hoorsten
- Nicole Charles - Nina Akaboa
- Nicholas Gleaves - DI Jeff Bevan
- Andrew Clover - The Clown
- Andrew Clover - The Clown/Tim Price
- Adam James - Edward Markham
- Geff Francis - Viv James
- Sean Harris - Arthur Layton
- Max Dowler - Police Sergeant
- Ronnie Le Drew - Zippy
- Rupert Graves - Danny Moore
- Christopher Fairbank - David Bonds
- Stephen Wight - George Bonds
- Amelda Brown - Elaine Bonds
- Nik Howden - Scared Youth
- Perdita Avery - Fiona
- Claire Rushbrook - Trixie Walsh
- Leo Bill - Ryan Burns
- Oliver Coleman - City Boy
- Lorna Gayle - Mrs Parkes
- Leanne Lakey - Street Girl 1
- Tracy Wiles - Street Girl 2
- Simon Molloy - Roseberry-Sykes
- Callum Dixon - Gnome Thief
- Lydia Leonard - Sara Templeton
- Paul Thornley - Ian Kay
- Michael Hadley - Harvey Dunn
- Lucy Briers - Patty
- Sarah Kants - Erin
- Simon Kassianides - Mortuary Assistant
- Russell Tovey - Marcus Johnstone
- Dan Fredenburgh - Simon Neary
- Jay Simpson - Reeks
- Phil Davis - Chas Cale
- Anna Wilson-Jones - Joan Cale
- Sid Mitchell - Billy Dane
- Madhav Sharma - Mr Chatterjee
- Troy Glasgow - Ska Boy
- David Schaal - Gene Look-A-Like
- Mathew Baynton - Tom Robinson
- Jim Creighton - Angus Ashton
- Paul Anderson - PC Murder Suspect
- Beth Willis
Sara Stewart interpreta a Gaynor Mason en la serie.
Keeley Hawes interpreta a Alex Drake en la serie.
Philip Glenister interpreta a Gene Hunt en la serie.
Dean Andrews hace el papel de Ray Carling.
Marshall Lancaster interpreta a Chris Skelton en la serie.
Montserrat Lombard hace el papel de Shaz Granger.
Daniel Mays hace el papel de Jim Keats.
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