Dr. Crozier prepares to transplant Mentor's brain with the help of the Doctor, while king Yrcanos, Peri and Dorf prepare to attack the Mentors. In the laboratory, Dr. Crozier decides that Peri may be a compatible body donor and sends for her.

Arriving back in the courtroom, the Doctor starts his defense by showing the future beginning with his arrival onboard the spaceship Hyperion III which is on it's way from the planet Mogar to Earth with a cargo of rare metals. The Doctor shows the court that the TARDIS picked up a distress signal and he responded to it. Upon arrival, the Doctor tells Mel that he can sense evil. They are then captured and brought before Commodore Travers.