| No. | Release Date | Title | Synopsis[4] | Written by |
| 1 | 14 August 2006 | "The Nazad Conspiracy" | Christmas 1936.
Ghost story writer Professor Dunning (Terry Molloy) doesn't believe in the supernatural. So he's more than surprised when an invisible winged demon appears in his drawing room.
The Metropolitan Police's longest-serving officer, Inspector Lionheart (Nicholas Courtney), doesn't believe in the supernatural either, wings or no wings. So he's less than impressed when Russian emigres begin dying impossible deaths all over London.
Together, Lionheart and Dunning must face quarrelsome Generals, sinister clowns and Russian demons as they unravel the Nazad Conspiracy. | Simon Barnard |
| 2 | 7 May 2007 | "The Devil Of Denge Marsh" | In investigating the curious case of a melting scientist, MI-13 uncover a scientific project gripped by madness near a remote village on the Kent coast inhabited by locals with strange habits. Lionheart and Dunning must do battle with the Women's Institute, an old adversary and an inter-dimensional being from the dawn of time. | Paul Morris |
| 3 | 5 May 2008 | "For King And Country" | 'Sir' Harry Price, self-proclaimed ghost detective, has built a machine to capture the spirits of the dead, if he can get his Price Ghost Captivator™ work. Meanwhile, Londoners are being killed, in especially gruesome fashion, with their own electrical appliances and the murderer is leaving cryptic messages in 17th century English at the scene. | Simon Barnard & Paul Morris |
| 4 | 1 September 2009 | "The Curse Of The Black Comet" | Sir Basil Champion (Brian Blessed) is the world's worst explorer. Having suffered being lost in the Kalahari among other adventures, he is finally eaten by a rhinoceros. MI-13 is called to investigate a mysterious outbreak of the Black Death at reading of Sir Basil's will.
To discover the connection with his ill-fated Egyptian expedition fourteen years earlier Lionheart and Dunning journey from London to Scotland and then to the lost tombs of Egypt. | Simon Barnard & Paul Morris |
| 5 | 8 November 2010 | "The Secret Weapon Of Doom" | After an unfortunate bathchair accident, Professor Dunning (Terry Molloy) is temporarily invalided out of the Secret Service. But returning to his first love, writing, proves more perilous than expected.
Meanwhile, unhinged MI-13 chief Colonel Black (Leslie Phillips) has a new case for Lionheart (Nicholas Courtney). Partnered with top spy - and housewives’ favourite - Victor Bright (Nigel Havers), Lionheart investigates the disappearance of a fabled super weapon - and discovers they aren't the only ones searching for it...
Death stalks our heroes at every turn. Lionheart and Dunning must fight for their lives as dark forces gather around the mysterious Secret Weapon of Doom... | Simon Barnard & Paul Morris |
| 6 | 1 November 2011 | "The Magic Circle" | Professor Dunning (Terry Molloy)is finding the business of single-handedly saving Great Britain from the forces of darkness rather taxing. And Lionheart? Lionheart is missing.
When the only clue to his disappearance seems to lie in a twenty-year-old murder investigation, Dunning turns to the one man who might have the answers: Lionheart's erstwhile colleague Harry ‘Thumper’ Crow (David Warner).
Harry doesn't hold with supernaturalism, but over the next few days he's going to see some very strange things indeed: a string of murdered magicians, a dead music-hall star come back to life, and a pensioner from the depths of hell.
Can Crow and Dunning find Lionheart? A terrible truth awaits, as they unearth the long-buried secrets of the Magic Circle. | Simon Barnard & Paul Morris |
| 7 | 4 June 2012 | "The Horror Of Loch Ness" | Sir Malcolm Campbell (played by Alex Lowe), the famous racer is practicing on Loch Ness for an attempt on the water speed record but disappears along with his boat in a mysterious bank of fog. MI:13's Harry Crow (David Warner) and Professor Dunning (Terry Molloy) go up to the loch-side village of Inverfarigaig to investigate. Aided by the local GP Dr Pippin (Philip Madoc), they discover a connection to the former "Laird of Boleskine and Abertarff" - the occultist Aleister Crowley (David Benson). Joined by Crowley, the investigations into Sir Malcolm's disappearance lead them into terrible danger, and an encounter with an old foe |
Simon Barnard & Paul Morris |
| 8 | 3 December 2012 | "The Thirteen Hallows" | When a haunted chess set causes consternation at the British Chess Championships, and a horse magically materialises in Kettering Agricultural Museum, MI:13 are called to investigate.
Harry Crow (David Warner) and Professor Dunning (Terry Molloy) follow the trail of inexplicable happenings to an unremarkable terraced house in South Wales, home to the mysterious Mr Merriman (David Benson). He's very old, and very mad; but is there more to Merriman than first appears?
Meanwhile, in the South West of England, famed archaeologist Ralegh Radford (Ewan Bailey) is on the verge of the greatest discovery of the age. Britain's Tutankhamen, the press are calling it. But what he certainly isn't expecting to unearth is boisterous 1400-year-old knight Glewlwyd Gafaelfawr (Gareth David-Lloyd).
As Crow and Dunning unravel an unlikely plot to resurrect Britain's greatest-ever hero, the race is on to stop sinister forces at home and abroad from finding the Thirteen Hallows. | Simon Barnard & Paul Morris |
| 9 | 17 October 2014 | "The King of Winter" | Midsummer, 1938. When a train porter is frozen to his living room chair (then nearly crowned Miss Croydon), MI-13's Harry Crow (David Warner) and Professor Dunning (Terry Molloy) are on the case. But what links the unfortunate porter to the equally glaciated peer-of-the-realm, Lord Trumpley? MI:13's investigations lead them to exclusive gentleman's establishment, The Tartarus Club, whose membership appears to be rapidly dwindling.
What is the secret of the Tartarus Club? Why are the villagers of Thornton Gibbet afraid of a 300-year-old ghost? And why is it snowing in June?
As everlasting winter sets in, Crow and Dunning find themselves pitted against their greatest foe yet, the King of Winter. | Simon Barnard & Paul Morris |
| 10 | 30 June 2017 | "The Gnomes of Death"[5] | When MI:13's mortuary begins filling up with the disembodied feet of gardening enthusiasts, Harry Crow (David Warner) and Professor Dunning (Terry Molloy) are plunged into a sinister world of garden allotments, topiary fowl and gaudy garden ornaments.
When the landlord of Harry's local, the Six Bells, is also found minus his snakeskin brothel creepers (and their contents), Crow and Dunning are plunged into a more sinister world still - of Morris dancers, exceptionally strong ale and all-powerful ancient Indian deities.
What is the dark secret of the Six Bells privy? Are the Beer and Real Ale Association merely hirsute eccentrics, or something else? And what is the real purpose of Morris dancing?
Crow and Dunning discover that horticulture can be a dangerous business, as they find themselves pitted against their shortest foes yet... the Gnomes of Death. | Simon Barnard & Paul Morris |
