characters

book 2
the doctor first visit to the overworld, in his 5th incarnation, ending up in the overworld by mistake, the Doctor finds something wrong with the timeline, the TARDIS crippled and the Doctor, Ceris and Daryll, stranded in a corrupted future, must learn what changed the timeline, stop the nether empire, and its unexpected leaders, and how does the master, one of the doctor's most deadly enemies. doing here, and what plans does he have.