- Ep: 1
- Target: London
- Starring: Sam Waterston (Quentin E. Deverill), A.C. Weary (Charlie), George Innes (Phipps), Sarah Berger (Betsy)
- And: Julian Glover (Kilkiss)
- Cast: Richard Morant (Richard), Ronald Lacey (Medium), Frederick Jaeger (Kaiser), John Abineri (Staff Officer), Robert Harris (Judge), Robert Arden (University President), Billy J. Mitchell (Professor), Robert Henderson (Old Professor), Edward Wiley (Young Professor), David Baron (Guest at Seance), Michael Stroud (Guest at Seance), Jean Burgess (Lady at Seance), Michael N. Harbour (Fisherman), Constantin de Goguel (German Commander), Paul Jerrico (German Sergeant), Kenneth Owen (German Corporal), Wolf Kahler (Technician), Steve Ubels (Technician), Paul Humpoletz (Flunkey)
- Written By: Robert Schlitt & John Hawkesworth
- Directed By: Don Sharp
- Ep: 2
- The Great Motor Race
- Starring: Sam Waterston (Quentin E. Deverill), A.C. Weary (Charlie), George Innes (Phipps), Caroline Langrishe (Jenny)
- And: Julian Glover (Kilkiss)
- Cast: Tim Woodward (Harry Owsley), Manning Redwood (Henry Ford), George Baker (Sir Harold Metcalfe), Henry McGee (Bassey), Franco DeRosa (Brunelli), Jeff Harding (Barney Oldfield), Eiji Kusuhara (Count Oyama), Gordon Rollings (Adcock), Robin Parkinson (Steward), Jonathan Burn (Lecours), Bill Reimbold (American Reporter), Olivier Pierre (French Reporter), David Shaughnessy (Official)
- Written By: Ronald Austin & James David Buchanan
- Directed By: Don Sharp
- Ep: 3
- Infernal Device
- Starring: Sam Waterston (Quentin E. Deverill), A.C. Weary (Charlie), George Innes (Phipps), Caroline Langrishe (Jenny)
- Guest Star: Ian Ogilvy (Lord Sarandon)
- Cast: Barrie Houghton (Kalnikov), George A. Cooper (Lord Eastleigh), Eric Kent (Blake), Bibs Ekkel (Hungarian), Patsy Smart (Old Woman), Francine Morgan (Dolly), Tony Caunter (Foreman), Ron Pember (Cabbie), Michael Burrell (Official), Terry Cowling (Bomb Man)
- Written By: Wallace Ware
- Directed By: Roy Ward Baker
- Ep: 4
- 4.10 to Zurich
- Starring: Sam Waterston (Quentin E. Deverill), A.C. Weary (Charlie), George Innes (Phipps), Caroline Langrishe (Jenny)
- And: Julian Glover (Kilkiss)
- Guest Stars: Paul Freeman (Professor Rep), Elizabeth Shepherd (Lady Potts)
- Cast: Paul Angelis (Kroll), Chris Jenkinson (Van Else), David Auker (Dutch Taxi Driver), Amy Dagley (Young Dutch Girl), Ingo Mogendorf (Swarthy Man), Brenda Cowling (Nun on Train), Thea Ranft (Dutch Girl's Mother), Benjamin Feitelson (French Chauffeur)
- Written By: Jeremy Paul
- Directed By: Henry Herbert
- Ep: 5
- To Catch a Ghost
- Starring: Sam Waterston (Quentin E. Deverill), A.C. Weary (Charlie), George Innes (Phipps), Caroline Langrishe (Jenny)
- Cast: Jean Anderson (Aunt Effie), Cyril Luckham (Crabtree), Shelagh McLeod (Caroline), John Vine (Gareth), Pauline Quirke (Jane), Ann Way (Minnie)
- Written By: Julia Jones
- Directed By: Don Sharp
- Ep: 6
- The Limehouse Connection
- Starring: Sam Waterston (Quentin E. Deverill), A.C. Weary (Charlie), George Innes (Phipps), Caroline Langrishe (Jenny)
- Guest Star: Burt Kwouk (Dr. Lin)
- Cast: Peter Cellier (MI5 Man), Sarah Lam (Priscilla), Timothy Bateson (Alfie), Derek Deadman (Wiggins), Barry Dennen (Russell), Rolf Saxon (American Associate), Alfie Curtis (Referee), Mike Lewin (Inspector Draycott), Peggyann Clifford (Large Lady in Shop), Carole Harrison (Tarty Girl), Cyril Cross (Policeman), Simon Henderson (Office Boy)
- Written By: Frank Unger
- Directed By: Roy Ward Baker
| Sam Waterston ... Professor Quentin Everett Deverill |
| A.C. Weary ......................... Charlie Andrews |
| George Innes ................................ Phipps |
| Sarah Berger ......................... Betsy Stevens |
| Caroline Langrishe .................... Jenny Martin |
| Julian Glover ................... Dr. Stefan Kilkiss |
