I found the script and plot of The Reaping almost offensively bad. It is saved by the cast, particularly Nicola Bryant, who is given some of the worst material of her Who career to work with (and that's saying something) and mostly pulls it off. The story is that Peri discovers that her best friend's father (who is mysteriously only 40) was murdered a few months after she started travelling with the Doctor. They return to Baltimore to investigate, but it is all an absurdly complex plot by the dying Cyberleader. The Doctor delivers the Cyberleader to Mondas, leaving Peri's mother to take charge of a dangerous device, which in due course explodes killing her. Written at a time when New Who was exploring the impact of Rose's travels on her family left at home, this is an obvious attempt to reconstruct Peri's story in the same mode. It fails. ( )