Cast: Jack May (William E. Simms), Martin Miller (Doctor Heindrick), Peter Madden (Doctor Sanderson), Carole Mowlam (Nurse Henders), Mary Yeomans (Louise), John Frawley (Sir Charles Thetford), Peggy Ann Wood (Lady Elizabeth Thetford), Horace James (Hinkaya), Patrick Kavanagh (Hammond), Norman Pitt (Charlesworth), John Cazabon (Simpson), Tom Clegg (Jarvis), William Hurndell (Logan), Peter Ducrow (Face), Kenneth Benda (Sir James), Gordon Faith (Foreigner)
Written By: Tony Williamson
Directed By: Roger Jenkins
Note: Lost episode
Ep: 18
Black Echo
Cast: Jack May (William E. Simms), Gladys Cooper (Grand Duchess Vorokhov), Judy Parfitt (Ireyna), Donald Eccles (Sir Henry), Peter Bathurst (Sir George), Peter Ducrow (The Face), Trevor Baxter (Beardsley), Brian Gilmar (Sergel), Mo Kiki (Cossack), Kenneth Ives (Oil Delivery Man), James Appleby (Chauffeur)
Written By: Donald and Derek Ford
Directed By: Moira Armstrong
Ep: 19
Conspiracy of Death
Cast: Jack May (William E. Simms), Derek Farr (Onslow), Annette Carell (Monique), John Scott Martin (Johnson), Harold Goodwin (Davison), George Woodbridge (Penrose), David Blake Kelly (Connelly), Fanny Carby (Colly), Leslie Glazer (Police Constable)
Written By: Vince Powell & Harry Driver
Directed By: Roger Jenkins
Note: Lost episode
Ep: 20
The Basardi Affair
Cast: Jack May (William E. Simms), Zia Moyheddin (Sheikh Abdul), Kate O'Mara (Sonia Fawzi), Suzanne Mockler (Eileen Smith), Joe Cornelius (Chauffeur), Roy Stewart (Guard), Salmaan Peer (Prince Mahmud), William Kendall (Sir Robert), Douglas Kirk (Servant), Elroy Joseph (Sword Dancer), Sumantha and Sumanda (Belly Dancers)
Written By: Ian Stuart Black
Directed By: Henri Safran
Note: Lost episode
Ep: 21
The Survivors
Cast: Jack May (William E. Simms), Edwin Richfield (Singleton), Edward Evans (Blundell), Anthony Dawes (Minister), Elizabeth Benson (Mrs. Granger), Erik Chitty (Chritchley), Roy Evans (Marty), Hilda Fenemore (Mrs. Clasp), Brian Mosley (Ray), Terry Walsh (Gerry)
Written By: Vince Powell & Harry Driver
Directed By: Moira Armstrong
Note: Lost episode
Ep: 22
Face in a Mirror
Cast: Jack May (William E. Simms), Edward Brayshaw (Gladwin), Jean Marsh (Lady Lydia), Ric Hutton (Maydew), Peter Ducrow, Fred McNaughton (Livingston), Bill John (Hudson), Bob Godfrey (Roach), Maurice Quick (Kilvert), Douglas Kirk (Wein), Ian McKay (Beddoes), Philip Anthony, Humphrey Heathcote, Graham Rigby (Reporters), Jack Philips (Waiter), Basil Dignam (Baker), Peter Stenson (Lewis), Rudolph Walker (Nikubu)
Written By: John Pennington
Directed By: Henri Safran
Note: Lost episode
Ep: 23
Another Little Drink
Cast: Jack May (William E. Simms), Peter Bowles (P.K. Davies), Sally Bazely (Carol Shelly), Meredith Evans (Doctor Loton), Norman Wyne (Supervisor), Stephanie Heesom, Pauline Fitzgerald (Dancers), Frederic Abbott (Yorke), Robert McBain (Addison), Michael Golden (Guard)
Written By: Ian Stuart Black
Directed By: Laurence Bourne
Note: Lost episode
Ep: 24
Death Begins at Seventy
Cast: Jack May (William E. Simms), Kenneth J. Warren (Doctor Henry Heason), Sheila Burrell (Matron), George Benson (Timothy Henshaw), Roy Evans (Postman), Windsor Davies (Charlie Pearson), Cyd Hayman (Mary Smith), John Glyn-Jones (Harry Newly), Bill McLean (Young Man), Derek Martin (Coach Driver), Nosher Powell (First Security Guard), Alan Thompson (Second Security Guard)
Written By: Dick Sharples
Directed By: Ridley Scott
Note: Lost episode
Ep: 25
Tunnel of Death
Cast: Jack May (William E. Simms), Geraldine Newman (Constance), Geoffrey Chater (Commissioner Hobson), Jerold Wells (Barker), Tex Fuller (Sewerman), Arnold Diamond (Scarlatti), Kenneth Ives (Bruno), Walter Sparrow (Brooke), Walter Glennie, Michael Greenwood, Derek Martin, John Mincer, Peter Sugden (Villains), Peter Ducrow, Denis Cleary, Frank Seton (Petty Crooks), John Lawrence (Policeman), John Garvin, James Appleby (Passers-by)
Written By: Richard Waring
Directed By: Moira Armstrong
Note: Lost episode
Ep: 26
The Deadly Bullet
Cast: Jack May (William E. Simms), Nigel Stock (Oliver Meadows), Bill Kerr (Inspector Foster), Sheila Brennan (Wanda Manton), Henry Gilbert (George Manton), John Garrie (Jimmy Manton), Jill Curzon (Juanita), Graham Corry (Carlos), Winnie Holman (Lily), Bernard Shine (Sergeant Valentine), Harold Bennett ("Pop" Williams)
Written By: Vince Powell & Harry Driver
Directed By: Henri Safran
Note: Lost episode
Ep: 27
The Resurrectionists
Cast: Jack May (William E. Simms), Wendy Gifford (Sara Linden), Bernard Kay (Doctor Morris Vaine, Frank Williams (Mr. Byers-Thompson), Peter Stephens (The Minister), Sheila Grant (Miss Coburn), Peter Torquil (Chauffeur), Tracey Crisp (Susan), Imogen Graham (Receptionist), Cicely Paget-Bowman (Mrs. Whitenshaw), Peter Ducrow, William Sully (Otto)
Written By: Derek and Donald Ford
Directed By: Ridley Scott
Note: Lost episode
Ep: 28
Wish You Were Here
Cast: Jack May (William E. Simms), Michael Gwynn (Lord Hawksmoor), Marion Mathie (Sonia), Hilda Barry (Mrs. Simms), Peter Birrel (Saville), Will Stampe (Arcade Attendant), Skip Martin (Hercules), Brian Hayes (R.A.C. Doorman), Anthony Blackshaw (Policeman), Terry Richards (Matron), Kitty Attwood, Maisie MacFarquhar, Maria Pope (Old Ladies), Arthur Wild (Pageboy), Neil Rhoden (Pianist)
Written By: James MacTaggart
Directed By: Moira Armstrong
Note: Lost episode
Ep: 29
A Sinister Sort of Service
Cast: Jack May (William E. Simms), T.P. McKenna (Jason Lang), Frances Cuka (Sandra Verrel), David Garth (Sir Nigel Dee), Peter Ducrow (The Face), John Crocker (Jeweller), David Kelly (Furrier), Josef Zaranoff (Miklo), Alf Joint (First Judo Student), Clare Jenkins (S.S. Girl), Mark Moss (Thomas), James Bulmer, Bill Lyons, Neil Curnow (S.S. Men)
