Tread Perilously returns to the Colin Baker era with "The Twin Dilemma."
The Doctor's recent regeneration seems to be failing and he decides to meditate in a cave on Titan III. But at the same time, his old mentor Azmael is also using Titan III for a different purpose. An evil purpose. He's kidnapped a pair of genius twins to aid in the master plan of Mestor, a giant gastropod with designs on the galaxy.
Erik and Justin try their best not to blame producer John Nathan-Turner for the excesses in the story, C. Baker's performance and the Sixth Doctor's clothes. Erik theorizes why some Timelords take on titles and other just use their names. Justin ranks Peri on the newly dubbed "Padbury Scale" and finds he likes the production design. Erik tries to explain his like for the Sixth Doctor while the character's first meeting with Peri inspires a visit from Sean Connery.