The Master's machinations to regain power through psychological manipulation and sabotage of naval operations, while exploiting others' vulnerabilities

The Doctor and Jo arrive at the island prison to visit the Master, only to find Colonel Trenchard dismissive of their concerns. His casual mention of recent ship disappearances sparks …

The Master turns the tables on Colonel Trenchard while feigning deference in his cell, mapping coordinates of recent ship sinkings on an Admiralty chart. What begins as ostensibly small talk …