31. Phil Pascoe: ...Ish
32. Marc Platt: Spare Parts (2002)
The Doctor (played by Peter Davison) and Nyssa land on a dying planet in interstellar space, where the dwindling remnant of the population is living in an old underground city. The people are generally sickly and miserable, and many have cybernetic replacements for diseased organs. Soon, they discover the name of the planet: Mondas.
This account of the birth of the Cyberman is a horror story and a tragedy, made all the more sad and terrible by the fact that there is no equivalent of Davros: these people are not xenophobic fascists like the Kaleds, but desperate humans, with English names like Yvonne and Thomas and Frank and Eric, who are just trying to find a way not to die. One of the best and saddest Doctor Who stories I have ever seen, heard or read, and also a credited inspiration for the Season 2 two-parter Rise of the Cyberman/The Age of Steel.
A plus also for bringing back the "original" Cyberman design from The Tenth Planet: the cloth face and the eerie sing-song voice make these Cybermen seem like the desperate last-resort survival measure that they really are.