John Thaw
— Det. Insp. Jack Regan
Dennis Waterman
— Det. Sgt. George Carter
Garfield Morgan
— Det. Chief Insp. Haskins
Lee Montague
— Arthur Dale
David Daker
— Tusser
Maureen Lipman
— Annie
Janet Key
— Kate Regan
Morris Perry
— Det. Chief Supt. Maynon
Stephen Yardley
— Det. Insp. Laker
Barry Jackson
— Morton
Miquel Brown
— Miriam
Peter Blythe
— Peter
Carl Rigg
— Det. Sgt. Kent
Michael De Costa
— South
Ron Pember
— Landlord
Jonathan Elsom
— Interviewer
Betty Woolfe
— Mrs Berry
Seymour Matthews
— Doctor
Don Henderson
— Strip Club Heavy
Nancy Gabrielle
— Johno's Wife
Del Baker
— Det. Sgt. Cowley
Peter Brayham
— Edward Grenfell (uncredited)
Josie Grant
— Woman in Pub (uncredited)
Joe Griffiths
— Miriam's Pianist (uncredited)
Jim Brady
— Man in Pub (uncredited)
Helen Keating
— Busty Woman in Pub (uncredited)