Original Sin (novel)

Publisher's Summary
I'm playing with a fire so dangerous I could scorch eternity.

The last words of a dying alien send the Doctor and Bernice to thirtieth-century Earth in an attempt to avert an unspecified disaster. Before they can even unpack they’ve been arrested by the Adjudicators and sentenced to death by the Imperial army. Their attempts to prove their innocence take them from the mosaic planet Purgatory to a prison inside a star.

Meanwhile, Adjudicators Roz Forrester and Chris Cwej have their own problems. Investigating a series of apparently motiveless murders, they have stumbled upon a conspiracy with sinister overtones. On the run and out of luck, the only people they can turn to are their chief suspects: the Doctor and Bernice.

And as they run, someone is watching them. Someone who knows the Doctor of old...

Main Characters
The Doctor
 * Enjoys lapsang souchong tea.

Bernice Summerfield
 * Hates being called 'Bernie'.
 * Is now 33 years old.

Christopher Rodonanté Cwej
 * Chris had a body bepple so that he looked like a teddy bear.
 * Made (and painted) model space ships when he was young.

Roslyn 'Sarah' Forrester
 * Once ate someone's ID.
 * Spent 2 years training on Ponten IV.

Professor Zebulon Pryce
 * Member of the University of Sallas.
 * Driven mad by Icarons.

Tobias Vaughn
 * Has kept himself alive since his previous encounter with the Doctor using salvaged Cybermen parts.

Fenn Martle
 * Spent some time as Roz's lover.
 * Was taking bribes.

Continuity

 * Vaughn scavenged Cyberman bodies from 1985 (DW: Attack of the Cybermen), 1986 (The Tenth Planet) and the post-Cyber-Wars period (DW: Revenge of the Cybermen).
 * The manner in which the Divine Empress is hooked into the computer system is extremely similar to the Controller in Bad Wolf.
 * The Divine Empress reappears in So Vile A Sin.