- Siegfried Rauch
- Â Dr. Mark Wedmann 13 episodes, 1974
- Margot Hielscher
- Â Dr. Yvonne Versseux 9 episodes, 1974
- Richard Loring
- Â Dr. Kehl 1 episode, 1974
- Giulia Follina
- Â Julia Montaglia 1 episode, 1974
- Norman C. Smith
- Â Mike 1 episode, 1974
- Anna Eugeni
- Â Dr. Graziella Marini 1 episode, 1974
- Udo Kier
- Â Roberto Agostino 1 episode, 1974
- John Bartha
- Â Prof. Tiberis 1 episode, 1974
- Brian O'Shaughnessy
- Â Dr. Frank 1 episode, 1974
- Alberto Farnese
- Â Filippo Gorgoni 1 episode, 1974
- Dieter Eppler
- Â Helmut Gehre 1 episode, 1974
- Johan te Slaa
- Â Jan Mulder 1 episode, 1974
- Nico Pepe
- Â Dr. Olivaro 1 episode, 1974
- Roberto Alessandri
- Â Interpol-Agent 1 episode, 1974
- Lyn Hooker
- Â Hella van Straaten 1 episode, 1974
- Hugh Rouse
- Â Henry Burbank 1 episode, 1974
- Harris Perloff
- Â Philip Bowker 1 episode, 1974
- Harry Mekela
- Â Samuel 1 episode, 1974
- Gerhard Steinberg
- Â Mjinheer Veendam 1 episode, 1974
- Ian Yule
- Â Jack 1 episode, 1974
- Mimmo Palmara
- Â Sanchez 1 episode, 1974
- Don McCorkindale
- Â Jack 1 episode, 1974
- Jules Hamel
- Â Kristjan Laiser 1 episode, 1974
- Ian Hamilton
-  Señor Tellez 1 episode, 1974
- Consalvo Dell'Arti
- Â Dr. Villa 1 episode, 1974
- Michael Tor
- Â Signor Astuto 1 episode, 1974
- Gabriel Bayman
- Â Dr. Todd 1 episode, 1974
- Attilio Duse
- Â Dr. Marco 1 episode, 1974
- Moira Downie
- Â Tibbie Draad 1 episode, 1974
- Eva Henriette Rossner
- Â Signora Palstra 1 episode, 1974
- Ralph Loubser
- Â Pieter Born 1 episode, 1974
- Ivor Kissin
- Â Gangsterboss 1 episode, 1974
- Gérard Landry
- Â Waterstraat 1 episode, 1974
- Elisabeth Versluys
- Â Mevrouw Laiser 1 episode, 1974
- Rita Forzano
- Â Maria 1 episode, 1974
- Percy Sieff
- Â Mr. Draad 1 episode, 1974
- Giuseppe Terranova
- Â Zollinspektor 1 episode, 1974
- George Jackson
- Â George 1 episode, 1974
- Frietmar Wehner
- Â Smell 1 episode, 1974
- Louis Ife
- Â Dr. Morten 1 episode, 1974
- Giorgio Paoletti
- Â Signore Agostino 1 episode, 1974
- Joe Seakatsie
- Â Sandy 1 episode, 1974
- Lisa Leonardi
- Â Beatrice 1 episode, 1974
- Manfred Seipold
- Â Sid 1 episode, 1974
- Gigi Reder
- Â Signore Montaglia 1 episode, 1974
- Alexander Hegarth
- Â Dr. Oldenstam 1 episode, 1974
- Anthony James
- Â Chemiker 1 episode, 1974
- Michael McGovern
- Â Lejeune 1 episode, 1974
- Bernard Berat
- Â Canova-Hartfield 1 episode, 1974
- Sue Wilson
- Â Pukka 1 episode, 1974
- Giovanni Sabbatini
- Â Wirt 1 episode, 1974
