Keeper of Traken

To not be confused with Peeper of Traken

The Doctor and Adric arrive on planet Traken, where everyone is so good and pure perfect space elves and evil shrivel up and dies.

They are greeted by Keeper Egghead, who tells the Doctor and Adric that Traken is in trouble for the first time in like 3000 years.

Consul Trim Ass, who is supposed to be the next Keeper because there's a Keeper each 1000 years, is getting married to Wicked Stepmother, a sexy redhead who is also the first person in 3000 years to show evil traits on Traken.

Trim Ass and his daughter Nissan Space Princess then invite the Doctor and Adric on breakfast. Adric loses his vaginity to Nissan.

Wicked Stepmother kills Trim Ass' BFF Snore, causing Trim Ass to get angry and have a spat. Instead, Wicked Stepmother banishes Trim Ass to prison alongside the Doctor and Adric. As Keeper Egghead dies after 1000 years, Wicked Stepmother thus becomes the next Keeper, but then shrivels up and dies too.

Turns out this was all a ploy of the Master, who wanted immortality and a new body by becoming the Keeper. The Doctor tries to talks the Master out of it, and it looks like the Master is gone. Adric and Nissan also created a new supercomputer to banish him away.

Some kid called Love Ick becomes the next Keeper instead, and the Master possesses Trim Ass' body.