The Master (archive footage)
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 Master
Summoned back to Gallifrey, the Doctor is framed for the assassination of the Time Lord President. To prove his innocence, he must stand for election himself, uncover the traitor in the Time Lord High Council, fight a hooded killer in a nightmare cyberspace world of his enemy's devising and battle against an old foe now out to destroy the Time Lords: The Master.
Fenner
Rivalry at a local Gilbert and Sullivan Society over who will play Jack Point in the Silver Jubilee production. Rowland Matthews has always been the main star, but he is getting on, and the young Clive Bates is a strong rival.
Mr King
Albert, a shy and repressed young man who lives with his mother, is persuaded to go for "a night out" with his workmates; it turns nightmarish.