I've been thinking about Mycroft’s decisions surrounding Eurus. In "The Final Problem," Mycroft states that Eurus has been in Sherrinford since early childhood. Let's say, for arguments sake, that Eurus was around 7 at this time, that would make Mycroft only 15 — too young to have been the driving force in any way behind the decision to have everyone believe she was dead. Indeed, he tells us that the idea was Uncle Rudi's initially ("what Uncle Rudi began, I saw fit to continue.")
This has got me thinking about at which point Mycroft became party to the secret. Did he know from the start? Did he work it out, or did Rudi tell him? Did he initially believe her dead too? What was his initial reaction to finding out?
I've written fics on this, but I have SO many questions! I'd love to get stuck in a lift with Mark Gatiss. 😂














