“The Monks have ruled the world since humanity took its very first baby steps towards the Sun. One problem… they haven’t always been there. And only Bill Potts sees the truth. But where is the Doctor? And how can Bill make the rest of the world see?”
https://tardis.fandom.com/wiki/The_Lie_of_the_Land_(TV_story)
“The Monks have ruled the world since humanity took its very first baby steps towards the Sun. One problem… they haven’t always been there. And only Bill Potts sees the truth. But where is the Doctor? And how can Bill make the rest of the world see?”
https://tardis.fandom.com/wiki/Monk_(species)
Ahhhh, right. Creepy tall monks, that’s the one. I don’t remember liking the episode much, to be honest