- Katie Boyle
- Â Katie Johnson 12 episodes, 1960-1961
- Peter Dyneley
- Â Joe Francis 6 episodes, 1960
- Patrick Barr
- Â John Baker 6 episodes, 1961
- Faith Brook
- Â Janet Turner 6 episodes, 1961
- Noel Howlett
- Â Barstow 6 episodes, 1960
- Michael Aldridge
- Â Detective Inspector McEwan 5 episodes, 1960
- Edward Judd
- Â Carstairs 5 episodes, 1960
- Gordon Daisley
- Â Lesseps 5 episodes, 1960
- Robert Cawdron
- Â Det. Supt. Tallerton 5 episodes, 1961
- John Lee
- Â John Redfield 4 episodes, 1960
- Margo McLennan
- Â Jean 4 episodes, 1960
- Rio Fanning
- Â Detective Sergeant 3 episodes, 1960
- William Dexter
- Â Carlo Ferri 2 episodes, 1960
- Henry B. Longhurst
- Â Taxi driver 2 episodes, 1960
- Frank Littlewood
- Â Doctor 2 episodes, 1960
- Malcolm Watson
- Â Manservant 2 episodes, 1960
- Roderick Cook
- Â Hotel receptionist 2 episodes, 1961
- John H. Watson
- Â Det. Sgt. Grahams 2 episodes, 1961
- Michael Caine
- Â Detective 1 episode, 1960
- Steven Scott
- Â Police Inspector 1 episode, 1960
- Irene Bradshaw
- Â Maid 1 episode, 1960
- Fred Ferris
- Â Assistant Commissioner 1 episode, 1960
- Douglas Blackwell
- Â Sub-Editor 1 episode, 1960
- Ann Talbot
- Â Italian girl 1 episode, 1960
- Josephine Llewellyn
- Â Florist 1 episode, 1960
- Lee Richardson
- Â Gunman 1 episode, 1960
- Sydney Keith
- Â American tourist 1 episode, 1960
- Anthony Foyle
- Â Pageboy 1 episode, 1960
- Maggie Jordan
- Â Maria 1 episode, 1960
- Colin Fry
- Â Garage man 1 episode, 1960
- Shirley Patterson
- Â Woman reporter 1 episode, 1960
- Jerry Dane
- Â Hotel porter 1 episode, 1960
- Henry De Bray
- Â Hotel proprietor 1 episode, 1960
- Wilfrid Brambell
- Â Andy Steele 1 episode, 1961
- Francis Matthews
- Â Billy Lowndes 1 episode, 1961
- Anneke Wills
- Â Minty 1 episode, 1961
- Alan Tilvern
- Â Dinty Martin 1 episode, 1961
- George Pastell
- Â Petro Mourtzimos 1 episode, 1961
- Lyndon Brook
- Â Cubby Trent 1 episode, 1961
- David Langton
- Â Commander Hamble 1 episode, 1961
- Ronald Adam
- Â Sir Robin Courtney 1 episode, 1961
- Joe Baker
- Â Eggy 1 episode, 1961
- William Fox
- Â Sir Lionel Foxton 1 episode, 1961
- Blake Butler
- Â Adams 1 episode, 1961
- Edward Evans
- Â Turnbull 1 episode, 1961
- Howard Lang
- Â Norman Tilsley 1 episode, 1961
- David Lawton
- Â Spiros Stephanopolos 1 episode, 1961
- Leslie Perrins
- Â Sir Leslie Melvyn-Browne 1 episode, 1961
- Llewellyn Rees
- Â Sir Andrew Templeton 1 episode, 1961
- Alan Tucker
- Â Detective Constable 1 episode, 1961
- Joan Ingram
- Â Mrs. Heston 1 episode, 1961
- Terence Soall
- Â Braham 1 episode, 1961
- Bernard Barnsley
- Â Rinty 1 episode, 1961
- Arthur Lawrence
- Â Sir Henry Kirk 1 episode, 1961
- Louis Haslar
- Â Hotel porter 1 episode, 1961
- Dorothy Darke
- Â Lady Hilda Pritchard 1 episode, 1961
- George McGrath
- Â Austin Newbolt 1 episode, 1961
- William Sherwood
- Â Walter Dunsmore 1 episode, 1961
- Ellen Blueth
- Â Maris 1 episode, 1961
- Edgar Driver
- Â Teaky 1 episode, 1961
- William Patenall
- Â Police Constable 1 episode, 1961
- Bertie Green
- Â Smoke 1 episode, 1961
- Eleanor Darling
- Â Sarah May 1 episode, 1961
- George Crowther
- Â Stevie 1 episode, 1961
