Doctor Who: 10 Times The Earth Was Invaded
7. The Monks' Earth (The Lie Of The Land)
After being forced to 'invite' the tyrannical Monks to Earth in order to save the Twelfth Doctor, Bill Pott's Earth was changed for the worst. Using their hypnotic powers to seed themselves throughout history, the Monks invaded Earth and nobody noticed that they weren't meant to be there - apart from Bill, Nardole, and a handful of resistance fighters.
Aiming to tear down the Monks' hypnotic emitter statues, free the world from the oppression and spread the 'truth', all Bill had to do was recruit the Doctor. Seemingly now on the side of the Monks, the Doctor threatened to expose their plan to their overlords until Bill pulled a gun on him. As the regeneration process began, the Doctor revealed that his treachery had been a trick to ensure Bill wasn't being controlled by the Monks.
Led by the Doctor, Bill infiltrated the Monks' base in London and used her memories of her mother - and the 'real world' - to break the creatures' hypnotic spell. With the Monks overthrown, they quickly fled the planet. Life slowly went back to normal, with humanity even forgetting about the invasion due to the Monks erasing themselves from Earth history with their powers.