- Colin Welland - PC David Graham
- Geoffrey Whitehead - PC Ken Baker
- Marcus Hammond - PC Taylor
- John Barrie - DCI Sam Hudson
- John Slater - DS Tom Stone
- Sebastian Breaks - PC Steve Tate
- Pauline Taylor - PC Susan Parkin
- Bernard Holley - PC Bill Newcombe
- Jennie Goossens - BD Girl
- Ron Davies - PC Doug Roach
- Paul Angelis - PC Bruce Bannerman
- Douglas Fielding - Sgt. Alec Quilley
- James Ellis - Bert Lynch
- James Ellis - PC Bert Lynch
- Ian Cullen - DC Joe Skinner
- Robert Keegan - Sgt. Bob Blackitt
- Robert Keegan - Sgt. Blackitt
- Derek Waring - DI Neil Goss
- Joseph Brady - PC John "Jock" Weir
- Joseph Brady - PC Weir
- Joseph Brady - P.C. Jock Weir
- Brian Blessed - PC William "Fancy" Smith
- Brian Blessed - PC Fancy Smith
- Brian Blessed - PC Smith
- Stratford Johns - DCI Charlie Barlow
- Stratford Johns - Det. Chief Inspector Charles Barlow
- Stratford Johns - Det. Chief Insp. Barlow
- Frank Windsor - DS John Watt
- Frank Windsor - Det. Sgt. Watt
- Frank Windsor - Det. Sergeant John Watt
- Terence Edmond - PC Ian Sweet
- Terence Edmond - PC Sweet
- Stephen Yardley - PC Alec May
- David Daker - PC Owen Culshaw
- Leonard Williams - Sgt. Percy Twentyman
- Leonard Williams - Sergeant Percy Twentyman
- Leonard Williams - Sgt. Twentyman
- John Woodvine - DI Alan Witty
- Lynda La Plante - Janey Hinden (as Lynda Marchal)
- Harry Towb - Dennis Steegan
- Anna Karina - Lady Customer (uncredited)
- Bernard Archard - HM Inspector of Constabulary
- Leslie Dwyer - Joe
- Anna Wing - Mrs. Jones
- Bernard Kay - Larry
- Carol Haddon - Jane Kingsley
- Carol Haddon - Mrs. Williams
- Glory Annen - Chorus Lady
- Sean Flanagan - Roy Grant
- Sean Flanagan - 1st Youth
- Sean Flanagan - Chris Coles
- Jack Carr - PC Covill
- Philip Anthony - Sgt. Philips
- Edwin Finn - Kenneth Sharkey
- Tommy Godfrey - Cafe Proprietor
- Carolyn Jones - Mrs. Nagus
- Patrick Marley - Mr. Murdoch
- Rudi Patterson - Mr. Price
- Linda Polan - Waitress
- Gerald Sim - Edward Hailey
- Julie Stevens - Mrs. Knowles
- Reg Whitehead - Det. Con. Cropper
- John Phillips - Det. Chief Superintendent Robins
- Frank Hawkins - Sergeant Barnes
- Verity Edmett - Dolores
- Keith Smith - Racegoer
- Derek Ware - Mike
- Frank Crawshaw - Football Coach
- Davy Jones - Willie Thatcher (as David Jones)
- Virginia Stride - Katy Hoskins
- John Gill - Thomas P. Smedley
- Dorothy White - Janey Steele
- Josephine Barrington - Hilda Cottrell
- Elizabeth MacLennan - Tessa Black
- Diana Coupland - Alice Cottrell
- James Mellor - Jackson
- Harry Shacklock - Timothy Boyle
- Charles Simon - Jake Solders
- Bartlett Mullins - Jerry Maclean
- Jeremy Kemp - Vagrant
- Dolores Mantez - Singer
- Allan O'Keefe - PC Render
- Paul Stewart - Sgt. Chubb
- Brian Grellis - DC Bowker
- Ronald Radd - Gus Haggerty
- Judy Matheson - Terri
- Tony Doyle - Patrick Dougan
- Fiona Cumming
- John Glenister
- Matthew Robinson
- Julia Smith
- Paul Bernard
- Mark Cullingham
- Tony Williamson
- Brian Finch
- Tony Holland
- Troy Kennedy Martin
- Pat Dunlop
- David Ellis
- David Rose
Frank Windsor interpreta a DS John Watt en la serie.
James Ellis interpreta a Bert Lynch en la serie.
Douglas Fielding interpreta a Sgt. Alec Quilley en la serie.
Capítulo disponible en las siguientes plataformas:
