The Eighth Piece (audio story)

 was the second story in the audio anthology Doom Coalition 3, produced by Big Finish Productions. It was written by Matt Fitton and featured Paul McGann as the Eighth Doctor, Nicola Walker as Liv Chenka, Hattie Morahan as Helen Sinclair and Alex Kingston as River Song.

Publisher's summary
15th century Prague: in the castle dungeons, a prisoner raves about the end of the world. Outside, Liv Chenka seeks out the workshop of a strange Clockmaker to see what he is creating.

England, 1538: Lord Thomas Cromwell finds his duties interrupted by otherworldly forces – clockwork soldiers, an unusual nun, and a mysterious scholar calling himself "the Doctor". Perhaps the truth can be extracted in the torture chamber of London's Bloody Tower?

Rome, 2016: Helen Sinclair has an appointment with an enigmatic Professor, whose greatest work is almost complete. Only the Eighth Piece is missing...

Plot
Osm hears the ticking of a Solver from his cell and begs for peace, saying that he is a good man. When the Clocksmith, Osm insists that he is not "one of [him]", but he ignores him and hurts him, not allowed to kill him. Osm says that everyone must know that the end is coming and the Clocksmith has him gagged, saying that it is time to complete his masterpiece and begin the countdown to doomsday.

After leaving Helen in Rome 2016, the Eighth Doctor takes Liv to Prague in the early 15th century, having run his sonic screwdriver's remains through the TARDIS and located temporal anomalies. The Doctor gives Liv a rundown of their separate missions and tells her that any further clock mechanisms that they find should only be moved by him, an explanation that is watched from below by a gagged Osm. Osm is visited by Apolena, who ungags him and gives him broth to eat before asking him to tell one of her stories to help him.

In England 1538, Abbot Malvern is forced to give riches over to Thomas Cromwell for King Henry VIII and is found withholding a ticking cog that recently came into the hands of the order. Cromwell finds Brother Octavian, whom Abbot Malvern says came to them disturbed, eavesdropping on them and says that he, a poor penitent, is how the religious should be. He threatens Abbot Malvern with early retirement should he be found withholding things of value in the future and leaves.

To be completed.

Cast

 * The Doctor - Paul McGann
 * Liv Chenka - Nicola Walker
 * Helen Sinclair - Hattie Morahan
 * River Song - Alex Kingston
 * Thomas Cromwell - John Shrapnel
 * Apolena - Kasia Koleczek
 * Solvers / Abbot - Glen McCready
 * Rosalia - Emma D'Inverno
 * Octavian - Tim McMullan
 * The Clocksmith - Nicholas Woodeson

Continuity

 * The Doctor tells Cromwell that he met Henry VIII while wearing a colourful coat. (AUDIO: Recorded Time)
 * The Doctor has coins from the planet Voga. (TV: Revenge of the Cybermen)
 * The Doctor mentions that there are fixed points in time. (TV: The Fires of Pompeii et al.)