The Trial of a Time Lord: Part Four 1986
6.8 220 All those on Ravolox are in exponentially greater peril than anyone can comprehend. If anything in the entire universe is to survive, it may come down to the Doctor arguing against machine logic over the value of life.
Runtime: 24 min
Starts: Colin Baker, Nicola Bryant, Michael Jayston, Lynda Bellingham, Joan Sims
Director: Nicholas Mallett