Mycroft was supposed to be watching Sherlock, Victor & Eurus that day but something distracted him. Then he couldn't solve Eurus's rhyme. Mycroft has always blamed himself and his parents blamed him too.
Just give me Mycroftian angst, someone can give him a hug if you want (preferred ship Mycroft/Lestrade)
S4 SPOILERS Mycroft - Alone
Just give me Mycroftian angst, someone can give him a hug if you want (preferred ship Mycroft/Lestrade)