Another adventure for everyone's favourite Time Lord. The Doctor (Colin Baker) and Peri arrive in the north of England during the Luddite uprisings, and discover that brilliant but amoral Time Lord the Rani is stealing the chemical which promotes sleep from the mine workers' brains. The Master is also in town, planning to use the disruptive Luddites to deprive the Doctor of his TARDIS and destroy him once and for all.

Bonnie Langford reads this thrilling novelisation of the debut TV adventure for the Seventh Doctor. Assailed by violent bolts of energy, the TARDIS is blasted off-course and forced to land on the barren planet of Lakertya. The turbulence triggers the Doctor's sixth regeneration - but that is the least of his worries. Why has the Rani, that ruthless renegade Time Lady, brought the Doctor to Lakertya? What are the hideous Tetrap guards? Who are the eleven geniuses she has imprisoned in her stronghold, and what is the vital significance of Strange Matter? Aided by the faithful Mel, the Doctor must do all he can to stop the Rani's diabolical scheme before it affects the whole of creation. Bonnie Langford, who played Mel in the BBC TV series, reads Pip and Jane Baker's novelisation of their 1987 TV adventure. Duration: 3 hours approx. (P) 2022 BBC Studios Distribution Ltd (c) 2022 BBC Studios Distribution Ltd

The longest 'Doctor Who' story ever. The Doctor (Colin Baker) is put on trial by his people the Time Lords for interference in the affairs of others; three segments of his past and future are presented as evidence. 'The Mysterious Planet' shows the Doctor and Peri (Nicola Bryant) in a battle with a megalomaniac machine on the planet Ravalox, but what are the mysterious 'secrets' it protects? 'Mindwarp' shows the Doctor apparently betraying Peri to the vile Sil (Nabil Shaban) and the Mentors - can the Matrix be falsifying the evidence against the Doctor? In his defence he presents 'Terror of the Vervoids', a future story where the Earth is threatened by evil plant life forms. In the final two episodes, 'The Ultimate Foe', the Doctor learns the truth about his prosecuting counsel, the Valeyard (Michael Jayston), and has to enter the Matrix to battle for his remaining lives. This was Colin Baker's last story as the Doctor.