Michael Jayston

The Doctor begins his defense, as he investigates deaths on a spaceship and tries to prevent its destruction; with Colin Baker.

[Trial of a Time Lord 14/14] Mel realizes that the Valeyard has created a weapon within the Matrix that will destroy the Time Lords, and the Doctor is forced to rely on the Master for help...

[Trial of a Time Lord 13/14] The Valeyard's true identity is revealed and the trial aborted, but the Doctor and Mel must pursue his new enemy into the Matrix itself, where nothing is quite what it seems.

The Vervoids begin to attack the crew and passengers.

The Doctor races to prevent the Hyperion III from entering the Black Hole of Tartarus.

The Doctor and Melanie search for the killer aboard the space liner.