46. The Third Doctor Visits Fascist London
Premiere: May 9, 1970
Marooned on Earth by his Time Lord superiors, Jon Pertwee's swashbuckling Third Doctor is entangled in a scientist's reckless plans to drill deep into the planet's crust. Desperate to repair his time-traipsing TARDIS, the Doctor is shuffled into a parallel universe where he encounters sinister counterparts of his companion Liz Shaw (Caroline John, in her terrific final appearance), Brigadier Lethbridge-Stewart (Nicholas Courtney) and other seemingly familiar faces.