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
to be added

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.)