The Spectre of Lanyon Moor (audio story)

 was the first Big Finish Productions Doctor Who audio story to feature Alistair Gordon Lethbridge-Stewart and the first 'official' meeting of the characters with the actors playing their characters. Nicholas Courtney had previously played the Brigadier in audio form in the two audio radio plays The Paradise of Death and The Ghosts of N-Space opposite Jon Pertwee and Elisabeth Sladen.

Publisher's summary
In a desolate Cornish landscape littered with relics of prehistoric man, the Sixth Doctor and Evelyn uncover a catalogue of mysteries.

What is the secret of the fogou? Can the moor be haunted by a demonic host of imps? And what is Brigadier Lethbridge-Stewart doing in Pengriffen?

Teaming up with his old friend, the Doctor realises that an ancient conflict is nearing its conclusion — and Lanyon Moor is set to be the final battleground.

Cast

 * The Doctor - Colin Baker
 * Dr. Evelyn Smythe - Maggie Stables
 * The Brigadier - Nicholas Courtney
 * Mrs. Moynihan - Susan Jameson
 * Philip Ludgate/Scryfan - Barnaby Edwards
 * Professor Morgan/Sancreda/UNIT Sentry - Toby Longworth
 * Sir Archibald Flint - James Bolam
 * Nikki Hunter/Pelagia Stamatis/Corporal Croft - Helen Goldwyn
 * Captain Ashforde - Nicholas Pegg

The Doctor

 * The Brigadier recognises the Doctor by how outrageously he is dressed.
 * The poem quoted by the Doctor is The Fairies by William Allingham.

Human organisations

 * The Brigadier is doing a little bit of undercover work for UNIT.

Locations

 * The Doctor once visited the Parthenon in Athens while it was being built.

Species

 * Around eighteen thousand years ago, a Tregannon spaceship visited what would become Cornwall.

Technology

 * The Doctor has a metadimensional rheostat in his pocket.
 * Sancreda's menantolian induction loop is made of menantol bisilicate.

Continuity

 * From the Doctor's perspective, this is the first time his sixth incarnation has met the Brigadier; however, the Brigadier met the Sixth Doctor for the first time in 1989. (PROSE: Business Unusual)
 * The Doctor finds out that the Brigadier is married for the first time in this story. He had previously learned this for the first time PROSE: The King of Terror and would learn this for the first time again in TV: Battlefield.
 * The Brigadier is still doing occasional UNIT undercover work, as he continues to do in AUDIO: The Wasting.
 * Mention is made of archaeologists Sir Percival Flint (mentioned in TV: The Dæmons) and Leamington-Smith (mentioned in TV: The Stones of Blood).
 * The Shlangiian (PROSE: Original Sin) are mentioned.