| Name | Character | Episodes |
|---|---|---|
| Ian Holm | Gordon | 1 |
| Bryan Marshall | Adrian Wills | 1 |
| John Normington | Arthur | 1 |
| John Welsh | Fred Cartwright | 1 |
| John Thaw | Wood | 1 |
| John Standing | Tony Wardle | 1 |
| Geoffrey Bayldon | The Man | 1 |
| Warren Clarke | Ronnie | 1 |
| Tom Bell | Bender | 1 |
| Robert Urquhart | Rutherford | 1 |
| Clive Swift | Machen | 1 |
| Helen Lindsay | Elizabeth | 1 |
| Leslie French | Leslie | 1 |
| Barry Jackson | Driver | 1 |
| Michael Craig | Bancroft | 1 |
| Victor Maddern | Harry | 1 |
| Brian Glover | Porter | 1 |
| Earl Cameron | Mr Marshall | 1 |
| Rudolph Walker | Colonel Soute | 1 |
| Stanley Lebor | Irving Sokolsky | 1 |
| Jack Hedley | Man | 1 |
| Liam Redmond | Cyril | 1 |
| David Healy | Frank Mancha | 1 |
| Gillian Bailey | Ruth | 1 |
| Jennie Linden | Ginny | 1 |
| Bill Stewart | Sammy | 1 |
| Brian Grellis | Marty Smith | 1 |
| George Innes | Leggett | 1 |
| Patience Collier | Miss Smith | 1 |
| Joe Lynch | Bob Blaw | 1 |
| Avis Bunnage | Violet | 1 |
| Edward Brayshaw | Pitt | 1 |
| Ian Hendry | Anthony Ashworth | 1 |