Writer: Marc Platt
Director: Gary Russell
Starring: Peter Davison as The Doctor and Sarah Sutton
as Nyssa
Release Date: 31 July 2002
Recorded: March 26/27th 2002
Music: Russell Stone
Production Code: 6C/E

On a dark frozen planet where no planet should be, in a rat-infested city with a sky of stone, the Doctor and Nyssa unearth a black market in second-hand body parts and run the gauntlet of augmented police and their augmented horses. And just between the tramstop and the picturehouse, the Doctor's worst suspicions are confirmed: the Cybermen have only just begun.

This story takes place between "Time-Flight" and "The Arc of Infinity".