We’d give a spoiler warning, but since you’re on Tumblr you’re caught up.
#4. The First Episode of Sherlock Predicts the Main Character’s “Suicide”
Doing her duty as a TV cop (that is, being antagonistic toward the brilliant outsider who always turns out to be right), Sergeant Sally Donovan says this early on in the episode:
"One day we’ll be standing around a body and Sherlock Holmes will be the one who put it there."
She’s convinced he’s a psycho, and to Sally’s credit, he is, but it’s also true that at the end of Season 2 the police end up on the scene of a death Sherlock was responsible for — his own. Even more chillingly, the taxi driver who’d been responsible for all the murders throughout the first episode turns out to be a pawn in Moriarty’s cat-and-mouse game with Sherlock, and even says this to the detective:
"I’m gonna talk to you, and then you’re going to kill yourself."