| Season 1 |
| 17 September 1969 |
Season 1, Episode 1: Troika
|
| 24 September 1969 |
Season 1, Episode 2: Smokescreen
|
| 1 October 1969 |
Season 1, Episode 3: The Promised Land
|
| 8 October 1969 |
Season 1, Episode 4: A Date with Leonidas
|
| 15 October 1969 |
Season 1, Episode 5: The Kazmirov Affair
|
| 22 October 1969 |
Season 1, Episode 6: A New Face
|
| 29 October 1969 |
Season 1, Episode 7: You Don't Exist
|
| 5 November 1969 |
Season 1, Episode 8: The Children of Delight
|
| 12 November 1969 |
Season 1, Episode 9: Reliable Sources
|
| 19 November 1969 |
Season 1, Episode 10: Short Change
|
| 26 November 1969 |
Season 1, Episode 11: Exit a Diplomat
|
| 3 December 1969 |
Season 1, Episode 12: Care of Her Majesty
|
| 10 December 1969 |
Season 1, Episode 13: Visitor from Moscow
|
| 17 December 1969 |
Season 1, Episode 14: Time Bomb
|
| Season 2 |
| 11 August 1970 |
Season 2, Episode 1: Inside
|
| 18 August 1970 |
Season 2, Episode 2: Dinner Date
|
| 25 August 1970 |
Season 2, Episode 3: Depart in Peace
|
| 1 September 1970 |
Season 2, Episode 4: Miss International
|
| 8 September 1970 |
Season 2, Episode 5: Warrant for a Phoenix
|
| 16 September 1970 |
Season 2, Episode 6: The Pleasure of Your Company
|
| 23 September 1970 |
Season 2, Episode 7: Not to Be Trusted
|
| 30 September 1970 |
Season 2, Episode 8: Borderline Case
|
| 7 October 1970 |
Season 2, Episode 9: Love from Doris
|
| 14 October 1970 |
Season 2, Episode 10: Sorry Is Just a Word
|
| 21 October 1970 |
Season 2, Episode 11: Error of Judgement
|
| 28 October 1970 |
Season 2, Episode 12: Reported Missing
|
| 4 November 1970 |
Season 2, Episode 13: Fool's Mate
|
| Season 3 |
| 4 April 1973 |
Season 3, Episode 1: A Copper Called Craven
|
| 11 April 1973 |
Season 3, Episode 2: Round the Clock
|
| 18 April 1973 |
Season 3, Episode 3: Inquisition
|
| 25 April 1973 |
Season 3, Episode 4: Assault
|
| 2 May 1973 |
Season 3, Episode 5: Polonaise
|
| 8 May 1973 |
Season 3, Episode 6: Red Herring
|
| 16 May 1973 |
Season 3, Episode 7: Death by Drowning
|
| 23 May 1973 |
Season 3, Episode 8: All the King's Men
|
| 6 June 1973 |
Season 3, Episode 9: Threat
|
| 13 June 1973 |
Season 3, Episode 10: The Other Man
|
| 20 June 1973 |
Season 3, Episode 11: You won't remember me
|
| 27 June 1973 |
Season 3, Episode 12: Hostage
|
| 4 July 1973 |
Season 3, Episode 13: Blueprint for Murder
|
| Season 4 |
| 14 February 1974 |
Season 4, Episode 1: Double Exposure
|
| 21 February 1974 |
Season 4, Episode 2: Catherine the Great
|
| 28 February 1974 |
Season 4, Episode 3: Jailbait
|
| 7 March 1974 |
Season 4, Episode 4: Stand and Deliver
|
| 14 March 1974 |
Season 4, Episode 5: Something About a Soldier
|
| 21 March 1974 |
Season 4, Episode 6: Rendezvous
|
| 28 March 1974 |
Season 4, Episode 7: Sounds Sinister
|
| 4 April 1974 |
Season 4, Episode 8: Entente Cordiale
|
| 11 April 1974 |
Season 4, Episode 9: Date of Birth
|
| 18 April 1974 |
Season 4, Episode 10: Intercept
|
| 25 April 1974 |
Season 4, Episode 11: Alien
|
| 2 May 1974 |
Season 4, Episode 12: Diversion
|
| 9 May 1974 |
Season 4, Episode 13: Downwind of Angels
|
