Tread Perilously continues to celebrate 90 years of Tom Baker with the Doctor Who story called "The Invisible Enemy."
When the Virus of the Nucleus of the Swarm makes contact with human astronauts on a relief mission to Titan in the year 5000, The Doctor and Leela are also caught up in events. Soon, The Doctor is infected with the Nucleus itself while Leela is strangely immune. The pair arrive on a medical asteroid. The Doctor asks renowned scientist Dr. Marius to clone him and miniaturize the clone so The Doctor can take a fantastic voyage inside his own body. Will it stop the Swarm or will Leela prove to have the best solution?
Erik and Justin are surprised to see actor Michael Sheard twice in two weeks and go on about his time as both Admiral Ozzel in The Empire Strikes Back and Hitler in Indiana Jones and the Last Crusade. Louise Jameson and Leela prove to be standouts even as the script constantly mentions how dumb the character is meant to be. Erik discusses the work of producer Graham Williams while Justin determines Baker's mental health during the recording of the story. The dodgy (and occasionally great) special effects examined, K-9 makes his debut in Doctor Who continuity, and Marius proves to have too much character.
