- Tamzin Outhwaite - Katherine Winterborn
- Richard Chamberlain - James Whittaker Wright III
- Angel Coulby - Alice
- David Haig - Sir Anthony Reeves
- Charlie Creed-Miles - Howard Jennings
- Mel Smith - Benny Frazier
- Mark Benton - Finch
- Lolita Chakrabarti - Miss Baboor
- Richard Dillane - Graham Poole
- Orla Brady - Meredith Gates
- David Calder - Victor Maher
- Robert Wagner - Anthony Westley
- Valerie Minifie - Receptionist
- Robert Pugh - Frank Gorley
- Clemency Burton-Hill - Melissa DeMonfort
- Keith Barron - Hemmings
- Patrick Ryecart - Sir Edmund Richardson
- Philip Jackson - Arthur Bond
- Colin Baker - Phil
- Brian Murphy - Larry
- Paul Nicholls - Adam Rice
- Ronald Pickup - Harry Holmes
- Kenneth Cranham - Francis Owen
- Rhoda Lewis - Frieda
- Sara Cox - Self
- Cordelia Bugeja - Receptionist
- Paul Kaye - Tim Millen
- Simon Day - Luke Baincross
- Stephen Campbell Moore - Quenton Cornfoot
- Tim Plester - Sam Knowles
- Richard Harrington - Sam Richards
- Ben Miles - Stephen Winterborn
- Max Beesley - Jake Henry
- Lee Ingleby - Trevor Speed
- Stanley Townsend - Johnny Keyes
- Tim McInnerny - Judge Anthony Kent
- Daniel Mays - Mervyn Lloyd
- Danny Webb - Rex Kennedy
- Anna Chancellor - Wendy Stanton
- Michael Brandon - Marcus Wendell
- Hannah Gordon - Susan
- David Harewood - Don Coleman
- Denis Lawson - Benny
- Patrick Baladi - DI Sid Fisk
- John Barrowman - Dr. Dean Deville
- Paterson Joseph - Dexter Gold
- Martin Kemp - Harry Holmes
- Mark Williams - Dale Ridley
- Lee Ross - Ray Fordham
- Vincent Regan - DCI Wells
- Tom Goodman-Hill - Alfie Baron
- Joe Armstrong - Joe Ryan
- Michelle Bonnard - Secretary
- Shaun Dooley - Cool Hand Cooper
- Roger Lloyd Pack - Clive Ban
- Nina Sosanya - Linda Runcorn
- Pip Torrens - Heinz Zimmermann
- Paul Brooke - Benny
- Guy Henry - Samuel
- Rick Warden - Paul Hopkins
- Velibor Topic - Charlie
- William Beck - Jiles
- Mark Bazeley - Pinky Byrne
- Clive Swift - Yusef
- Sophie Ward - DCI Angela Wainwright
- Andrew Havill - Dr. Mansfield
- Tom Brooke - Joel
- Michael Smiley - Max
- David Sterne - Bob
- Julian Firth - Jeremy Garrett
- Joseph Long - Restaurant Manager
- Frances Barber - Clarissa
- Patricia Hodge - Veronica Powell
- Tony Rohr - Archie
- Malcolm Sinclair - Reece
- Lara Cazalet - Emily Shaw
- Abhin Galeya - Wasam Madani
- James Laurenson - Peter Williams
- Tom Mannion - Neil Cooper / DePalma
- Ken Bones - DCI Mullens
- Bryan Kennedy - Maitre D'
- Thomas Ho - Chef (uncredited)
- Sara Carver - Rachel
- Eamon Geoghegan - Pete
- John Gillett - Peter
- Vincenzo Nicoli - Sam
- Lola Peploe - Hotel Receptionist
- David Schaal - Man at Hospital
- Kate Miles - Bea Watson
- Brian Pettifer - Tip Jones
- Roger Blake - CID Officer
- Laura Girling - Head Scientist
- Rashid Karapiet - Naveen
- Valentine Pelka - Antique Shop Owner
- David Spinx - Security Guard
- David Walliams - Dress Shop Manager
- Jane Guernier - Dress Shop Customer
- Andrew Buckley - Shop Manager
- Sakuntala Ramanee - Sunita Channa
- Phil Smeeton - Senior Bank Guard
- Branka Katić - Olenka
- Jake Canuso - Barman at Spa Hotel
- Surinder Duhra - Barman at Restaurant
- Brian Lonsdale - Caretaker
- Leon Ockenden - Simon
- Craig Parkinson - Art Tutor
- George Potts - Hotel Receptionist
- Elizabeth Rider - June
- Vladimir Rajcic - Mario
- Kay Stonham - Janice Reeves
- Paul Ansdell - Maitre D'
- Ian Bustard - Punter at Club
- Sam Lathem - Punter at Club
- Mac McDonald - American on plane
- Francis Magee - Journalist
- Shend - Mark Whittaker
- Gresby Nash - Nick
- Vincent Franklin - Nigel Henney
- Emma Davidson - Office Receptionist
- Amanda Jane Manning - Woman (uncredited)
- Rebecca Lacey - Juliette Keyes
- Brett Fancy - Maitre D'
- Maryann Turner - Old Nun
- Phil Atkinson - Cabbie
- Flaminia Cinque - Hospital Receptionist
- Stewart Harwood - Landlord
- Doreen Mantle - Anne Foster
- Eileen Essell - Mary
- Lee Cornes - Ray Bond
- Peter Shea - PC
- Brian Hickey - House Owner
- Andrew Bridgmont - Oliver Price
- Eleanor Matsuura - Receptionist
- Fay Ripley - Sam Phillips
- Kieran Bew - Neil Davis
- Mark Tandy - Gideon
- Jake Nightingale - D.I. Cole
- Nicholas Palliser - Auction House Manager
- Gregory Floy - Richard Shaw
- Gerrard McArthur - Auctioneer
- William Scott-Masson - Paul Simms
- Evelyn Duah - Auction House Receptionist
- Nigel Whitmey - Chip Lacey
- Grant Masters - Snake Eyes
- John Harding - Shop Manager
- Liz May Brice - DS Terri Hodges
- Shirley King - Lily
- Robert Llewellyn - Compere
- Daniel Kruyer - Custody Sergeant
- Christie Goddard - Hotel Receptionist
- Jenny Tarren - Joyce Martin
- Ben Smith - Joey Frazier
- Ryan Gage - Billy
- Tom Clarke Hill - American 'Mark'
- Harry Miller - Cabbie
- Danny Worters - Thief
- Emma Buckley - Sharon Frazier
- Winston Ellis - Kevin
- Nigel Hastings - Chris
- Patrick Cremin - P.C.
- David Doyle - Mechanic
- Linford Christie - Self
- Christine Adams - Nigella
- Peter Ferdinando - Flash Git
- Robert Goodman - Pimp
- Simon Greenall - Commissionaire
- Richard Katz - Pinky Richards
- Blair Plant - Limo Driver
- John White - Cabbie
- David Phelan - Rodney
- Natasha Estelle - Stewardess
- Silas Carson - Kulvinder Samar
- Emil Marwa - Rocky
- Renu Setna - Harold
- Roderic Culver - Ford
- Glen Davies - House Owner
- Danny Erskine - Den
- Gareth Tunley - IT Man
- Queen Elizabeth the Queen Mother - Self (Archive Footage)
- John Arthur - Sergeant Eric Milverton
- Helen Coker - DI Deborah Eastman
- Gary Cross - Guard
- Charles Daish - DCI Neil Cooper
- Sarah-Jane Holm - Doctor
- Ian Puleston-Davies - DCI Matthew York
- Mark Spalding - Custody Sergeant
- Scott Burn - Scott
- Steve Hytner - Richard Hamilton
- Geno Monteiro - Police Officer
- Katie Walder - Janet
- Nikki Magnusson - Pool Patron
- Nicholas Bishop - Plummy
- Callum Dixon - Jockey
- Jamie Foreman - Dickie Brennan
- Jeremy Legat - Young Learner Driver
- Nick Sampson - Marcus
- Paul Bigley - Property Auctioneer
- Alan Chimes - Simon
- Kenneth Cope - Colin
- Craig Crosbie - Wine Auctioneer
- Alan David - Vino Vinnie
- Philippe De Grossouvre - Sommelier
- Alison Garland - Helen
- Tim Matthews - Simon, Flashy Young Businessman
- Dido Miles - Lab Technician
- Rupert Vansittart - Jonathan Mortimer-Howe
- Teresa Mahoney - City Worker Buying Cocaine
- Richard Arnold - Self
- Leon Black - Nathan
- John Carlisle - Lester
- Mark Holden - Bouncer
- Bill Moody - Landlord
- Vinette Robinson - Tina
- Elizabeth Tan - Lu Choi
- Forbes KB - Builder
- Eiji Kusuhara - Mr. Yakubi
- Will Yun Lee - Shiro
- Charlotte Nguyen - Keiko
- Paul Venables - Edwin
- Tristram Wymark - City Broker
- Max Grodénchik - Norm
- Barry Shabaka Henley - Thomas Jackson
- William Lucking - Harry Doyle
- Bob McCracken - Joe Pepper
- Rusty Meyers - Johnny's Bodyguard
- Chris Tardio - Johnny Maranzano
- Leslie Thurston - Woman
- Nicole Chauvet - Cocktail Waitress
- Geoffrey Gould - Slot Machine Repairman
- Jonny Phillips - Neil Ryder
- David Kennedy - Rory
- Steve Hope Wynne - Roger Levell
- Andrew Greenough - Restaurant Manager
- Leena Dhingra - Martha
- Elizabeth Croft - Young Woman
- Tom Kanji - City Trader
- Lucy Drive - Receptionist
- Guy Williams - Gallery Manager
- Greg Bennett - City Businessman
- Lizanne Tulip - May
- Jonathan Slinger - Campbell
- Lucy Akhurst - Governor
- Neil D'Souza - Morgue Security Guard
- Gary Cargill - Peter
- Patrick Bergin - Toby Baxter
- Nicholas Ball - Frank Rice
- Martin Friend - Vincent
- Alexander Abadzis - Haupman
- Simon Kassianides - Tracer
- Kate Fleetwood - MP Rhona Christie
- Roger Griffiths - Lennie
- Steven Robertson - Troy
- Jane Lowe - Miriam
- Alix Wilton Regan - Michelle
- Bennet Thorpe - Jago
- David Henry - Minister
- John Macmillan - Harry Fielding
- Simon Burke - Nick
- Roger Heathcott - Alan
- Susan Vidler - Naomi
- Adam James - Carlton Wood
- Simon Kunz - Stephen Glencross
- Zubin Varla - D.I. Silk
- Paul Chahidi - Tamir Abu-Alsaud
- Christopher Keegan - Bank Clerk
- Nicholas Sidi - Clifford Davis
- Richard Sutton - Sales Assistant
- Jack Bennett - Security Guard
- Walter Hall - Mr. Hodge
- Joanna Wake - Angela
- Richard Dixon - Peter Waters
- Lexy Howe - Receptionist
- Christopher Driscoll - Male Resident
- Tor Clark - Daycare Nurse
- Derek Herbert - Winston Churchill
- Karen Archer - Mrs. Greenaway
- Joanna Bobin - Hayley
- Adam Fray - Walter
- Peter Jones - Self
- Deborah Meaden - Self
- Duncan Bannatyne - Self
- Anna Madeley - Jennifer Hughes
- Tom Beard - Nigel Chambers
- Indira Varma - D.C.I. Lucy Britford
- Kevin Eldon - Anxious
- Amit Shah - Ashur Olmert
- Danny Sura - Syrian Guard
- Morgan Walters - Custody Sergeant
- Muj Shah - Syrian Bank Clerk
- Samantha Edmonds - Betty Greenacre
- Louise Mardenborough - Susan Kane
- India Wadsworth - Grace
- Alex Hassell - Viscount Manley
- Angela Griffin - Georgina Althorp
- Tim Wallers - Casper
- Ashley Taylor-Rhys - Call Centre Guy
- Andrew Westfield - Dosh4You Man
- Christopher Kelham - Hotel Manager
- Nicholas Asbury - Talbot
- Amy Booth-Steel - Young Woman
- James Carroll Jordan - Sheriff Wendel
- Tom Hodgkins - Pastor Wendell
- Neal Foster - Expert
- Virginia Stride - Albert's Grandmother
- Steve McTigue - Casino Removals Man
- Shaun Lucas - Auction Bidder
- Jake Rollins - Man in Bar
- Joplin Sibtain - Danush Larijani
- Ian Hallard - Vicar
- Daren Elliott Holmes - Vic the Mick
- Mark Roper - Phil
- Dimitri Leonidas - Pete Wilson
- Danny Kirrane - Michael Williams
- Vicky Hall - Woman - Cheryl Cole
- Joe Egan - Night Club Security
- Frank Ellis - Railton FC Caretaker
- Simon Paisley Day - Consultant
- Gordon Seed - Gino Genovase
- Claire Goose - Kathleen
- Vincent Riotta - Carlo Bachini
- Kenneth Gilbert - Benesh
- Delroy Brown - Canteen Manager
- George Rossi - Marco
- Vincent Keane - Bank Robber 3
- Cliff Parisi - Arnie
- Marlene Sidaway - Vivienne Marchant
- Harry Hepple - Barry
- Hermione Gulliford - Tamara Pilkington
- Isabella Parriss - Phoebe Pilkington
- Ella Ainsworth - Shania
- Paula Wharton - Farmer
- Sheila Hancock - Dolly Hammond
- Peter Polycarpou - Petre Sava
- Bill Bailey - Cyclops
- Robert Cavanah - Gerald McCrary
- Neil Bell - Bogdan
- Vanessa Hehir - Louise Holmes
- Skye Lourie - Kat Farmer
- Lloyd Hutchinson - DS Loach
- Liam McKenna - Harbinger
- Martin Wimbush - Sheldon Greyshot
- Phil Cornwell - Seedy Bob
- Carl McCrystal - Man in dark suit
- Nicholas Boulton - Tall man
- Raquel Cassidy - Dr. Dana Deville
- Jodie Prenger - Carol
- Stuart McQuarrie - DS Rivet
- Munir Khairdin - Ali
- Syreeta Kumar - Nurse
- Pax Baldwin - Reporter
- Dionne Bromfield - Casino Cashier
- Peter Vollebregt - Austrian Scientist
- Neil McNulty - Spencer Gibbs
- Sammy Williams - Alfie Beezer
- Teddy Kempner - Reg
- Daniel Goode - David Trip
- Verona Rose - Glam Girl Drinking at Bar
- Selva Rasalingam - Barir
- Gary Beadle - Nick
- Graham Bryan - Lee
- William Ellis - Pinstripe 1
- Tom Roberts - D.C.I. Alan Richards
- Ashley Walters - Billy Bond
- Grant Ibbs - Pinstripe 2
- Michael Webber - Pub Landlord
- Bharat Nalluri
William Beck interpreta a Jiles en la serie.
Daniel Mays hace el papel de Mervyn Lloyd.
Rupert Vansittart hace el papel de Jonathan Mortimer-Howe.
Stuart McQuarrie hace el papel de DS Rivet.
Jamie Foreman interpreta a Dickie Brennan en la serie.
Adrian Lester hace el papel de Michael Stone.
Robert Glenister interpreta a Ashley Morgan en la serie.
Matt Di Angelo hace el papel de Sean Kennedy.
Kelly Adams interpreta a Emma Kennedy en la serie.
Robert Vaughn hace el papel de Albert Stroller.
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