| Person | Type | Job | Role(s) | Episodes |
|---|---|---|---|---|
 Allan Surtees | Cast | Actor | Red Rayner | 1 |
 Angus Lennie | Cast | Actor | Danny Fitch | 1 |
 Anton Phillips | Cast | Actor | Jackson | 1 |
 Barry Jackson | Cast | Actor | Bertie Cooper | 1 |
 Bernard Lloyd | Cast | Actor | Councillor Fordham | 1 |
 Brian Hall | Cast | Actor | PC Drake | 2 |
 Christopher Beeny | Cast | Actor | Daley | 1 |
 David Graham | Cast | Actor | Jack Davis | 1 |
 David Lloyd Meredith | Cast | Actor | Det. Sgt. Evans | 149 |
 Desmond Llewelyn | Cast | Actor | Somers | 1 |
 Edward Petherbridge | Cast | Actor | Johnny Hicks | 1 |
 Frank Windsor | Cast | Actor | Det. Chief Supt. Watt | 149 |
 Gary Waldhorn | Cast | Actor | Jameson | 1 |
 George Cottle | Cast | Actor | Morry Fine | 1 |
 Gillian Barge | Cast | Actress | Mrs. Harrison | 1 |
 Graham Ashley | Cast | Actor | Roy Simpkins | 1 |
 Harry Fielder | Cast | Actor | Technician (uncredited) | 1 |
 Jeffrey Segal | Cast | Actor | Jennings | 1 |
 Jill Gascoine | Cast | Actress | Maggie Grant | 1 |
 Jimmy Gardner | Cast | Actor | Tom Price | 1 |
 John G. Heller | Cast | Actor | Maitland | 1 |
 John Junkin | Cast | Actor | Norden | 1 |
 John Savident | Cast | Actor | Stackpole | 1 |
 John Woodvine | Cast | Actor | Det. Chief Supt. Allan | 1 |
 Johnny Briggs | Cast | Actor | Jackie Turner | 1 |
 Kenneth Waller | Cast | Actor | James Potter | 1 |
 Michael Brennan | Cast | Actor | Collins | 1 |
 Michael Culver | Cast | Actor | Paul Ashworth | 1 |
 Michael Gambon | Cast | Actor | Cranley | 1 |
 Norman Bird | Cast | Actor | Samuel Tomkins | 1 |
 Norman Bowler | Cast | Actor | Det. Chief Insp. Hawkins | 149 |
 Patricia Hodge | Cast | Actress | Chris Stroud | 1 |
 Patrick Jordan | Cast | Actor | Tate | 1 |
 Paul Angelis | Cast | Actor | Billet | 1 |
Peter Brett | Cast | Actor | Mitchell | 1 |
Peter Childs | Cast | Actor | Det. Sgt. Grant | 1 |
 Peter Sallis | Cast | Actor | Edward Letheridge | 1 |
 Prentis Hancock | Cast | Actor | William Ross | 1 |
 Reginald Marsh | Cast | Actor | Chief Supt. Ted Leach | 1 |
 Roger Lloyd Pack | Cast | Actor | Martin Webb | 1 |
 Roland Culver | Cast | Actor | Mr. Fordham | 1 |
 Stratford Johns | Cast | Actor | Det. Chief Supt. Charles Barlow | 1 |
 Terence Rigby | Cast | Actor | PC Henry Snow | 2 |
 Terrence Hardiman | Cast | Actor | Insp. Armstrong | 7 |
 Walter Gotell | Cast | Actor | Chief Constable Arthur Cullen | 3 |
 Windsor Davies | Cast | Actor | Stephens | 1 |
 Jean Boht | Cast | Actress | Mrs. Lacey | 1 |
| Person | Type | Job | Role(s) | Episodes |
