Special Guest Stars: Sylvia Syms as Arlene Flemming | Paul Daneman as Dr. Ormsby |

Guest Stars: Gabrielle Drake as Diana Flemming | Norman Bird as Inspector Mitchell | Fulton Mackay as John Everett | John Tate as Skinner | Godfrey Quigley as Mike Ballard | Francis De Wolff as Captain Charles Flemming | Olive Milbourne as Mrs. Haggerty | Jonathan Elsom as Andrew Carter | Fredric Abbott (1) as Joe Carney | Geoffrey Lumsden as Coroner | John Ringham as Dr. Russell | Joanne Dainton as Nurse | Eric Mason as Sailor (as Erik Mason)

Writer: Joseph Morhaim, A. Sanford Wolf

Guest Stars: Shirley Eaton as Reb Denning | Robert Hutton as Brett Sunley | Julian Glover as Ramon Falconi |

Co-Guest Stars: Bryan Marshall as Moreno | Charles Houston as Al Vitale | Warren Stanhope as Marty Bresset | Leslie Crawford (1) as Peter Rendo (as Les Crawford) | Ros Drinkwater as Inez | Dennis Chinnery as Carson

Guest Stars: Ivor Dean as Chief Insp. Teal | Alan MacNaughtan as Charlie Lewis (as Alan McNaughtan) | T. P. McKenna (1) as Tony | Reginald Marsh as Ed Brown | Stephanie Beacham as Penny | Kenneth Farrington (1) as Ashford | Edward Brayshaw as Pietro | Bruce Boa as Mark | Brian Coburn as Dickie | Sheila Keith as Cynthia Ffouldes | Edward Kelsey (1) as Williams |

Uncredited: Harry Fielder as Kidnapped Security Guard

Guest Stars: Ivor Dean as Chief Insp. Teal | Robert Hardy as Walter Faber | Suzan Farmer as Sara Douglas | John Robinson as Jason Douglas | David Cargill as Eddie Margoles | Kenneth Gardnier as John Chatto | Lorna Wilde as Carla Lawrence | Leslie Crawford (1) as Dunn | Terry Plummer as Healey | Maggie London as Julie | Charlotte Selwyn as Shop Assistant | Yutte Stensgaard as Telephone Operator | Brian Harrison (1) as Police Doctor

Guest Stars: Tony Britton (1) as Jonathan Roper | Caroline Mortimer as Kate Barnaby | Glynn Edwards as Leander | Norman Bird as Mr. Horace Spode | John Collin (1) as Cable | Simon Lack as George Anthony Craddock | Mark Dignam as Major Carter | Terence Edmond as Captain Yates | Tony Caunter as Mason | Douglas Ditta as Highland Driver

Guest Stars: Gregoire Aslan as Eugene Patroclos | Kate O'Mara as Annabel II | Denise Buckley as Annabel I | Blake Butler as Bainter | Michael Robbins as Pat Hurst | June Abbott as Girl in London Airport | Michael Mellinger as Hotel Clerk | Martin Wyldeck as First Man at Party | Geoffrey Morris (1) as Second Man at Party | Rose Alba as First Woman at Party | Anne Godfrey as Second Woman at Party | Michael Pemberton (2) as Egan (Footman) | Iain Blair as Chuck Spendelton

Guest Stars: Suzanne Lloyd (1) as Mary Ellen Brent | Maurice Good as Steven Lyall | John Barcroft as Dinny Haigh | Terence Rigby as Charlie Mason | Freddie Jones (1) as Martin Graves | Monica Grey (1) as Donna Sumrie | Linda Marlowe as Laura Carlton

Guest Stars: John Turner as Cord Thrandel | Lyn Ashley as Jean Lane | Burt Kwouk as Mr. Ching | Christopher Benjamin as Fish | Robert Morris (3) as Max | Paul Greenhalgh as Tony Lane | James Locker as Dr. King | Brenda Kempner as Nurse | Leslie Anderson as Porter | Edwin Brown (1) as Van Driver | Prudence Drage as Girl Customer

Guest Stars: Anthony Bate as Dr Sardon | Annette Andre as Carmen | Mervyn Johns as Dr Davis | Alex Scott (1) as Armstrong | Glyn Houston as Dylan Williams | Richard Owens as Shoni Morgan | Talfryn Thomas as Owen Thomas (as Talfyn Thomas) | Heather Seymour as Mary | Anthony Blackshaw as The Guard | David Garfield (1) as First Local | Dafydd Havard as Second Local | Peter Lawrence (1) as Third Local | Reg Pritchard as Fourth Local

Guest Stars: Andrew Keir as Gilbert Kirby | Jean Marsh as Anne Kirby | Mark Burns as Elliott Stratton | Gillian Lind as Mrs. Stratton | John Barron (1) as Neal R. Lammerton | Geoffrey Chater as Carl Howard | Ronald Leigh-Hunt as John Ramsey | Victor Maddern as Jim Cowdry | John Boxer as Sir John Mulliner | Brian Badcoe as Dr. Downray | Leon Cortez as Mac | John Crocker as The Blind Man | Edward Harvey (2) as The Sheriff | Clifford Parrish as Mr. Roach | Dorothea Phillips as Mrs. Barnes

Guest Stars: Neil Hallett as Charles Bonner | Susan Travers as Laura Stevens | Gary Miller as Slater | Ray Lonnen as Jackson | Salmaan Peer as Suresh Gupta | Imogen Hassall as Malia Gupta | Nik Zaran as Chaudri | Joan Newell as Mrs. Reynolds | Michael Robbins as Harry Baxter | Ron Pember as Sam Barlow | Julian Sherrier as Mr. Sen | Jeremy Anthony as 1st Pakistani

Story: Ray Austin | Screenplay: Donald James (1)

Guest Stars: Kenneth J Warren as Ben Kersh | Judee Morton as Jenny Kersh (as Judee Morten) | Sandor Eles as Jean Latour | Derek Newark as German | Warren Stanhope as Arnie Garnett | John Savident as Frank Lomax | Tony Wright as Largo | Jeanne Bates as Lila Prentice (as Jane Bates)

Guest Stars: Ian Hendry as Allessandro Destamio

Guest Stars: Stuart Damon as Rod Huston | Ronald Radd as Henri Flambeau | Isla Blair as Janine Flambeau | Willoughby Goddard as Boris | Paul Stassino as Colonel Rakosi | Jeremy Young (1) as Gregorio | Antony Stamboulieh as Franco (as Anthony Stamboulieh) | Alan Rowe as Lafitre | Jacky Allouis as Henriette | Carol Friday as Josette | Derek Smee as Young Man | Araby Lockhart as American Lady | Hugh Morton as Attendant | Les White as Frogman

Guest Stars: Clifford Evans as Keith Longman | Jayne Sofiano as Herself | Veronica Carlson as Vanessa Longman | Steven Berkoff as Carl | Valentine Palmer as Ronald | John D. Collins (1) as Chick | Iain Blair as Morris | Barry Andrews as Tom | Hedger Wallace as Ian | James Vallon as James | Geoffrey Lumsden as Dr. Williams | Brian Tully as Dr. Grange | David Kelsey as Dennis | Barry Stanton as Pete

Guest Stars: Anna Carteret as Diane Huntley | Ivor Dean as Chief Inspector Teal | Anne De Vigier as Josephine | Trevor Bannister as Johnny Fox | Petra Davies as Edna White | Marne Maitland as The Guru | Hazel Coppen as Mrs. Blondel | Tina Ruta as Opera Singer | Larry Taylor as Ashok | David Prowse as Tony | Harry Littlewood as Postman

Guest Stars: Patricia Haines as Kay Collingwood | John Ronane as Justin Pritchard | James Kerry (1) as George Hapgood | George A. Cooper (1) as Harold Laker | Eddie Byrne (1) as Mr. Hapgood Snr. | William Wilde as Tom Stevens | Rosemary Donnelly as Dilys | Reg Whitehead as Microphone Man | Anthony Sheppard as Rally Official | Clifford Earl as Rally Official | Bernard G. High as Radio Man