"That's what people
DO!"
A pool. A doctor wrapped in Semtex and a parka. Snipers poised to shoot, unseen. A criminal mastermind who threatens the safety of the entire nation, if not others as well. And he giggles and reminds you of when he posed as the gay I.T. tech and boyfriend of the girl in the lab. This is the high-energy climax of the third and final episode of the first season in the BBC's series Sherlock, starring Benedict Cumberbatch as the famous consulting detective and Martin Freeman as his faithful medical companion. In the this episode, Sherlock is bored without a case and upset that John's blog post about their first case makes him seem idiotic and John leaves. Later, the building across the streets suffers an explosion, whihc shatters the windows behind Sherlock, though he is unharmed. John returns the next day, frantic, as he had heard on the news about the explosion while at his girlfriend's apartment.
The two are called in by Detectvie Inspector Lestrade, who gives Sherlock a package on his arrival. It contains a replica of the pink cell phone that was used in their first case, and shows a picture of a basment Sherlock recognizes as 221C after sounding a beep five times. Sherlock, John, and the DI go to 221C where Sherlock gets a blocked call from a woman who is being held hostage in her own car with an explosive vest strapped to her. She tells him, acting as a voice for an unkown third party, that Sherlock must solve the case in 12 hours, or else the vest will be detonated. Sherlock manages to solve the puzzle, realizing that it was his very first case from when he was a child that was delcared an accident, and the woman is saved by the bomb squad. All the while, John was working on a case for Sherlock's older brother Mycroft that Sherlock hadn't wanted to take himself.