The Master's ambition for global domination through technological manipulation and mind control.

The Doctor, freshly revived from near-death by the Master, immediately rejects cooperation and exposes the true danger of the Keller Machine—a parasitic entity that feeds on malevolence. The Master, dismissive …

In the Prison Governor’s office, the Doctor and Jo assess their compromised escape attempt after spotting a search party forming outside. The Doctor, feigning calm, reveals the Master’s endgame: hijacking …