With the threat of doom ever-present, the Doctor and Adric press on for Logopolis, where the muttered mathematical incantations of its people can completely overhaul the TARDIS. En route they discover an accidental yet demanding passenger on board while, all the while, the Master secretively journeys with them to ensnare the Doctor in a diabolical trap. Written by
Did You Know?
According to Christopher H. Bidmead
, the Logopolitans employ a hexadecimal, or base-16, numerical system, a real system commonly used in computer programming. When Adric and the Monitor read strings of numbers and letters, the letters are actually the numbers between 10 and 15, expressed as single digits. See more
The doors to the police box (not the Tardis) open inward on several occasions, even when the police try to follow the Doctor. In reality, police box doors opened outwards. The police officers should have known this. See more
[feeling the TARDIS lurch
Crazy idiot of a pilot! Wait till I have a word with him.
Featured in A New Body at Last