Sherlock Season 4 Finale: 13 Dumbest Moments From 'The Final Problem'
3. Eurus Can Somehow Control Everyone
How did Eurus manage to break free of her super high secure facility? It's an interesting question, given it's an island and she's under constant surveillance and on total lockdown.
The answer is that she can control anyone she meets.
Oh, right, of course. How, exactly?
She just can. Don't ask questions.
It's through this apparent superpower that Eurus can brainwash the entire prison staff into letting her come and go as she please - presumably with transport to London thrown in for good measure - and remove the glass case she's contained in, as well as set up the entire game she lays out for Sherlock.