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…