Cast: Philip Stone (Dr. Tredding), Catherine Woodville (Peggy), Godfrey Quigley (Spicer), Murray Melvin (Charlie), Charles Wade (Johnson), Alister Williamson (Detective Superintendant Wilson), Moira Redmond (Stella), Astor Sklair (Detective Sergeant Rogers), June Monkhouse (Mrs. Simpson), Robert James (Ronnie Vance)
Written By: Ray Rigby
Directed By: Don Leaver
Ep: 2
Brought to Book
Cast: Lionel Burns (Prentice), Redmond Bailey (Lale), Clifford Elkin (Pretty Boy), Neil McCarthy (Bart), Charles Morgan (Nick Mason), Godfrey Quigley (Spicer), Philip Stone (Dr. Tredding), Ingrid Hafner (Carol Wilson), Joyce Wong Chong (Chinese Girl), Robert James (Ronnie Vance), Alister Williamson (Detective Superintendant Wilson), Michael Collins (Detective Sergeant Rogers), Carol White (Jackie)
Written By: Brian Clemens
Directed By: Peter Hammond
Ep: 3
Square Root of Evil
Cast: Heron Carvic (Five), Cynthia Bizeray (Secretary), Michael Robbins (Bloom), George Murcell (Hooper), Vic Wise (Warren), Alex Scott (The Cardinal), Delphi Lawrence (Lisa), Ingrid Hafner (Carol Wilson)
Written By: Richard Harris
Directed By: Don Leaver
Ep: 4
Nightmare
Cast: Gordon Boyd (Williams), Ingrid Hafner (Carol Wilson), Helen Lindsay (Faith Braintree), Michael Logan (Commander Reece), Robert Bruce (Dr. Brown), Redmond Bailey (Dr. Jones), Robert Sansom (Dr. Miller)
Written By: Terence Feely
Directed By: Peter Hammond
Ep: 5
Crescent Moon
Cast: Patience Collier (Senora Mendoza), Harold Kasket (Bartello), Bandana Das Gupta (Carmelita Mendoza), Nicholas Amer (Luis Alvarez), Eric Thompson (Paul), Jack Rodney (Fernandez), Roger Delgado (Vasco), George Roderick (Carlos)
Written By: Geoffrey Bellman & John Whitney
Directed By: John Knight
Ep: 6
Girl on the Trapeze
Cast: Delena Kidd (Vera), Nadja Regin (Anna Danilov), Ingrid Hafner (Carol Wilson), Ian Gardiner (Policeman), Kenneth J. Warren (Zibbo), Howard Goorney (Superintendant Lewis), Edwin Richfield (Stefan)
Written By: Dennis Spooner
Directed By: Don Leaver
Ep: 7
Diamond Cut Diamond
Cast: Douglas Muir (One-Ten), Sandra Dorne (Fiona Charles), Hamlyn Benson (Dr. Collard), Ingrid Hafner (Carol Wilson), Joy Webster (Stella Creighton)
Written By: Max Marquis
Directed By: Peter Hammond
Ep: 8
The Radioactive Man
Cast: George Pravda (Marko Ogrin), Christine Pollon (Mary Somers), Ingrid Hafner (Carol Wilson), Gerald Sim (Dr. Graham)
Written By: Fred Edge
Directed By: Robert Tronson
Ep: 9
Ashes of Roses
Cast: Olga Lowe (Olive Beronne), Mark Eden (Jacques Beronne), Peter Zander (Johnny Mendelssohn), Ingrid Hafner (Carol Wilson), Hedi Erich (Denise)
Written By: Peter Ling & Sheilah Ward
Directed By: Don Leaver
Ep: 10
Please Don't Feed the Animals
Cast: Tenniel Evans (Felgate), Ingrid Hafner (Carol Wilson), Carole Boyer (Christine), Harry Ross (Kollakis), Alastair Hunter (Renton-Stephens), Catherine Ellison (Yvonne), Genevieve Lyons (Sarah), Mark Baker (Barman)
Written By: Dennis Spooner
Directed By: Dennis Vance
Ep: 11
Hunt the Man Down
Cast: Maurice Good (Paul Stacey), Ingrid Hafner (Carol Wilson), Melissa Stribling (Stella Preston), Susan Castle (Nurse Wyatt)
Written By: Richard Harris
Directed By: Peter Hammond
Ep: 12
Dance With Death
Cast: Ingrid Hafner (Carol Wilson), Caroline Blakiston (Elaine Bateman), David Sutton (Trevor Price), Angela Douglas (Beth Wilkinson), Ewan Roberts (Major Caswell), Pauline Shepherd (Valerie Marne), Diana King (Mrs. Marne), Geoffrey Palmer (Philip Anthony), Norman Chappell (Porter)
Written By: Peter Ling & Sheilah Ward
Directed By: Don Leaver
Ep: 13
One For the Mortuary
Cast: Peter Madden (Benson), Ingrid Hafner (Carol Wilson), Ronald Wilson (Scott), Dennis Edwards (Pallaine), Malou Pantera (Yvette Declair), Frank Gatliff (Dubois), Irene Bradshaw (Maid), Toke Townley (Bernard Bourg)
Written By: Brian Clemens
Directed By: Peter Hammond
Ep: 14
The Springers
Cast: Douglas Muir (One-Ten), David Webb (Pheeney), Charles Farrell (Straker), Brian Murphy (Haslam), Arthur Howard (Mr Groves), Margo Andrew (Caroline Evans), Donald Morley (Neame)
Written By: John Whitney & Geoffrey Bellman
Directed By: Don Leaver
Ep: 15
The Frighteners
Cast: Ingrid Hafner (Carol Wilson), Willoughby Goddard (The Deacon), Philip Gilbert (Jeremy de Willoughby), Philip Locke (Moxon), Doris Hare (Mrs. Briggs), Stratford Johns (Sir Thomas Weller), Dawn Beret (Marylin Weller), David Andrews (Nigel), Godfrey James (Nature Boy), Neil Wilson (Beppi), Eric Elliot (Butler), Ann Taylor (Secretary), Ralph Tovey (Waiter), Benn Simons (Inspector Foster), Eleanor Darling (), Benny Nightingale (), Victor Charrington (), Frank Peters (), Charles Wood
Written By: Berkeley Mather (aka Lieutenant Colonel Jasper Davies)
Directed By: Peter Hammond
Ep: 16
The Yellow Needle
Cast: Andre Dekar (Sir Wilberforce Lungi), Ingrid Hafner (Carol Wilson), Eric Dodson (Inspector Anthony), Margaret Whiting (Jacquetta Brown), Bari Johnson (Chief Bai Shebro), Wolfe Morris (Ali)
Written By: Patrick Campbell
Directed By: Don Leaver
Ep: 17
Death on the Slipway
Cast: Peter Arne (Kolchek), Frank Thornton (Sir William Bonner), Nyree Dawn Porter (Liz Wells), Paul Dawkins (Sam Pearson), Sean Sullivan (Fleming), Redmond Bailey (Geordie Wilson), Robert G. Bahey (Jack), Barry Keegan (Inspector Georgeson), Tom Adams (P.C. Butterworth), Douglas Muir (One-Ten), Gary Watson (Pardoe), Patrick Connor (P.C. Geary), Hamilton Dyce (Sergeant Brodie), Billy Milton (Chandler)
Written By: James Mitchell
Directed By: Peter Hammond
Ep: 18
Double Danger
Cast: Charles Hodgson (Mark Crawford), Robert Mill (Harry Dew), Peter Reynolds (Al Brady), Ronald Pember (Bert Mills), Ingrid Hafner (Carol Wilson), Vanda Hudson (Lola Carrington), Kevin Brennan (Bruton), Gordon Phillot (Bartholomew)
Written By: Gerald Verner
Directed By: Roger Jenkins
Ep: 19
Toy Trap
Cast: Hazel Graeme (May Murton), Tony Van Bridge (Henry Burge), Nina Marriott (Alice), Sally Smith (Bunty Seton), Ann Tirard (Mrs. McCabe), Brandon Brady (Freddie), Brian Jackson (Johnnie), Lionel Burns (Photographer), Tex Fuller (Lennie Taylor), Mitzi Rogers (Ann)
Written By: Bill Strutton
Directed By: Don Leaver
Ep: 20
The Tunnel of Fear
Cast: Stanley Platts (Maxie Lardner), John Salew (Jack Wickram), Ingrid Hafner (Carol Wilson), Murray Hayne (Harry Black), Douglas Muir (One-Ten), Doris Rogers (Mrs. Black), Nancy Roberts (Madame Zenobia), Miranda Connell (Claire), Douglas Rye (Billy), Morris Perry (Sergeant)
Written By: John Kruse
Directed By: Guy Verney
Ep: 21
The Far Distant Dead
Cast: Reed de Rouen (Luis Garcia), Katherine Blake (Dr. Ampara Alverez Sandoval), Francis de Wolff (Hercule Zeebrugge), Tom Adams (Rayner), Andreas Malandrinos (Godoy), Michael Mellinger (Mateos), Guy Deghy (Inspector Gauvreau)
Written By: John Lucarotti
Directed By: Peter Hammond
Ep: 22
Kill the King
Cast: Burt Kwouk (King Tenuphon), James Goei (Prince Serrakit), Patrick Allen (General Tuke), Lisa Peake (Mei Li), Peter Barkworth (Crichton-Bull), Ingrid Hafner (Carol Wilson), Moira Redmond (Zoe Carter), Ian Colin (Major Harrington), Carole Shelley (Ingrid Storm), Andy Ho (U Meng), Eric Young (Suchong)
Written By: James Mitchell
Directed By: Roger Jenkins
Ep: 23
Dead of Winter
Cast: John Woodvine (Harry), Blaise Wyndham (Syd), Carl Duering (Gerhardt Schneider), David Hart (Dr. Brennan), Sheila Robins (Inez), Ingrid Hafner (Carol Wilson), Michael Sarne (Willi), Zorenah Osborne (Margarita), Neil Hallett (Weber), Norman Chappell (Ted), Arnold Marle (Dr. Kreuzer)
Written By: Eric Paice
Directed By: Don Leaver
Ep: 24
The Deadly Air
Cast: Ann Bell (Barbara Anthony), Michael Hawkins (Dr. Philip Karswood), Keith Anderson (Heneager), Richard Butler (Herbert Truscott), Allan Cuthbertson (Dr. Hugh Chalk), John Stratton (Dr. Owen Craxton), Douglas Muir (One-Ten), Ingrid Hafner (Carol Wilson), Cyril Renison (Dr. Harvey), Anthony Cundell (Ken Armstrong), Geoffrey Bayldon (Professor Kilbride)
Written By: Lester Powell
Directed By: John Knight
Ep: 25
A Change of Bait
Cast: Victor Platt (Archie Duncan), John Bailey (Lemuel Potts), Henry Soskin (Peter Sampson), Ingrid Hafner (Carol Wilson), Robert Desmond (Herb Thompson), Graham Rigby (Nat Fletcher), Gary Hope (Barker), Arthur Barrett (Andre), Norman Pitt (Bryan Stubbs), Gillian McCutcheon (Ivy), Harry Shacklock (Charlie), Michael Hunt (Steed's Helper)
Written By: Lewis Davidson
Directed By: Don Leaver
Ep: 26
Dragonsfield
Cast: Sylvia Langova (Lisa Strauss), Alfred Burke (Saunders), Ronald Leigh-Hunt (Redington), Barbara Shelley (Susan Summers), Thomas Kyffin (Jack Alford), Keith Barron (Technician), Amanda Reeves (Secretary), Eric Dodson (One-Fifteen), Steven Scott (Boris), Michael Robbins (Landlord), Herbert Nelson (Peters), Morris Perry (Second Technician)
