- John Stone
- Â Mike Anson 25 episodes, 1957
- Donald Morley
- Â Jacques Delauny 25 episodes, 1957
- Sylva Langova
- Â Sylva 25 episodes, 1957
- Graham Crowden
- Â Colin 25 episodes, 1957
- Diana Lambert
- Â Phoebe 13 episodes, 1957
- Richard Molinas
- Â Machiavelli 5 episodes, 1957
- George Pastell
- Â The Chief 4 episodes, 1957
- John Bailey
- Â Romaine 4 episodes, 1957
- Raymond Adamson
- Â Greg 4 episodes, 1957
- David Garth
- Â Dufresne 4 episodes, 1957
- Petra Davies
- Â Eldor Kjoumerian 4 episodes, 1957
- John McLaren
- Â Arkwright / ... 4 episodes, 1957
- Frank Olegario
- Â Insp. Yakeez 4 episodes, 1957
- John Rumney
- Â Rankov 4 episodes, 1957
- Nancy Graham
- Â Mary Jane 4 episodes, 1957
- Fenella Fielding
- Â Djemila 3 episodes, 1957
- Stratford Johns
- Â Gustaf Eisenstein 3 episodes, 1957
- Edward Burnham
- Â Club Foot 3 episodes, 1957
- Wanda Rotha
- Â Frau Kohne 3 episodes, 1957
- Andre Van Gyseghem
- Â Breitmann 3 episodes, 1957
- John Sharplin
- Â Charlesworth 3 episodes, 1957
- Lian-Shin Yang
- Â Ying 3 episodes, 1957
- Barry Shawzin
- Â Yilman 3 episodes, 1957
- Elizabeth Ross-Williams
- Â Maria Voelckler 3 episodes, 1957
- Joss Ackland
- Â Immelmann 2 episodes, 1957
- Bernard Archard
- Â Meissner 2 episodes, 1957
- Colin Douglas
- Â Tiny McCrae 2 episodes, 1957
- Anthony Jacobs
- Â Ornescu 2 episodes, 1957
- Guy Deghy
- Â Loritzen / ... 2 episodes, 1957
- Frank Shelley
- Â Bazzini 2 episodes, 1957
- Arthur Gross
- Â Mertens 2 episodes, 1957
- Lawrence James
- Â Joe Murray 2 episodes, 1957
- Michael Rittermann
- Â Prof. Kjoumerian 2 episodes, 1957
- Andreas Antoniou
- Â Barman 2 episodes, 1957
- Michael Blythe
- Â Hintzel 2 episodes, 1957
- John Salew
- Â Colonel Munck 1 episode, 1957
- Eric Lander
- Â Peter Sheldon 1 episode, 1957
- Susan Richards
- Â Lady Sheldon 1 episode, 1957
- Derek Sydney
- Â Santos 1 episode, 1957
- Andre Charisse
- Â Insp. Baruch 1 episode, 1957
- Julian Sherrier
- Â Hasheem 1 episode, 1957
- Leonard Trolley
- Â Marsham 1 episode, 1957
- Victor Baring
- Â Nicolaides 1 episode, 1957
- Michael Jacques
- Â The Clerk 1 episode, 1957
- Jan Conrad
- Â Lehmke 1 episode, 1957
- Ellen Blueth
- Â Girl clerk 1 episode, 1957
- Michael Argy
- Â Milo 1 episode, 1957
- Helen Misener
- Â Frau Hoffbauer 1 episode, 1957
- Dermot Palmer
- Â Zeke 1 episode, 1957
