Doctor Who: How The Monk Got His Habit (2024)

The Monk arrives in Czarist Russia, where he has Grigori Rasputin listen to his song. However, the Monk’s amusement is short-lived, as the experience drives Rasputin completely mad. He dashes back to his TARDIS & looks up the incident on his TARDIS scanner, where he finds that this is enough to change history, which results in the Russian Revolution of 1917 being averted and consequently messes up the further course of human history. Terrified at what he has done, the Monk phones the Doctor and says: "Doctor, I've made a terrible mistake".