John Horton

After an encounter with the Master, an airline stewardess named Tegan Jovanka becomes an unwitting stowaway aboard the TARDIS as it travels to the planet Logopolis. There, the Doctor discovers that the Master's interference with the Logopolitans' advanced mathematics has unleashed a wave of entropy which threatens to consume the entire universe.

The Doctor and Jo find themselves trapped inside an alien peepshow machine which showman Vorg and his assistant Shirna have brought to amuse the populace of the planet Inter Minor. Can they escape Vorg and the ferocious Drashigs?

A group of gold-skinned aliens known as the Axons land on Earth and offer wondrous technology in exchange for fuel. The Doctor, however, isn't fooled, uncovering the Axons' true nature and once again facing his archenemy the Master...