"The Final Problem" is the third episode of the fourth series of the British television series Sherlock and the thirteenth episode overall. The episode was first broadcast on BBC One, PBS, Channel One on 15 January 2017.
Benedict Cumberbatch as Sherlock Holmes
Martin Freeman as Dr. John Watson
Mark Gatiss as Mycroft Holmes
Una Stubbs as Mrs. Hudson
Rupert Graves as DI Lestrade
Louise Brealey as Molly Hooper
Amanda Abbington as Mary Watson
A girl wakes up on an aeroplane and finds everybody asleep. She picks a mobile phone up and hears Jim Moriarty announce "Welcome to the Final Problem".
Mycroft Holmes is at home watching a vintage film, which stops with the words "I'M BACK", when a clown with a sword intrudes. Mycroft tries to escape, but Sherlock appears and reveals that he and John Watson staged the attack to prove that his sister, Eurus, exists.
On Baker Street, Mycroft reveals that their parents sent Eurus to a mental institution after she burned their home down. An adult Mycroft then sent her to a maximum-security facility, Sherrinford. He dismisses the idea that she has escaped, but on the next day at Baker Street, when they were discussing Eurus, a quadcopter carrying an explosive flies into the flat. John, Sherlock, and Mycroft are forced to flee as the bomb detonates.
Later, John and Sherlock hijack a boat to travel to Sherrinford and carry a diversion plan out so that Sherlock can reach Eurus' cell. Mycroft and John corner the prison governor, discovering that Eurus has taken control of the prison by influencing anyone with whom she speaks. Meanwhile, Sherlock talks to Eurus, but she attacks him and knocks him unconscious. The guards lock Sherlock, John, Mycroft, and the governor together in a cell.
Mycroft reveals that five years ago, he granted Eurus five unsupervised minutes with Moriarty as a Christmas present. In the present day, Eurus leads the captives in a series of psychological ordeals, forcing Sherlock into sinister games to save lives while videos of Moriarty taunt him. Although Eurus prods Sherlock onward with the prospect of saving the girl on the aeroplane, he eventually stops the games by threatening to shoot himself when she orders him to shoot either John or Mycroft. Frustrated, Eurus uses tranquilliser darts on the three of them.
Sherlock wakes up near his family's old house. He speaks to the girl in the aeroplane to try to guide her in landing safely. John wakes up at the bottom of a well. When he finds human bones there, Sherlock realizes that what he thought was his dog Redbeard was in fact his best friend, Victor Trevor. Eurus threw him into the same well and left him for dead because she felt left out of Sherlock's attention as a child. Sherlock then deciphers the real meaning of the song that Eurus originally taunted him with when Redbeard went missing, which reveals that she wants him to find her. Sherlock discovers that the girl in the plane is actually Eurus's mental metaphor and that the game has been a cry for help. With Eurus' puzzle solved, Sherlock is able to send her back to Sherrinford after rescuing John.
Mycroft explains to his and Sherlock's parents, who had been told by Mycroft that Eurus was dead, that Eurus refuses to speak to people anymore, but Sherlock visits her and they play violin together, giving performances for their parents and Mycroft. While helping Sherlock repair his destroyed flat, John receives a video sent by Mary before she died, encouraging him to continue having adventures with Sherlock.
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This is Sherlock series’s final episode, so i suggest you to watch the previously episodes of Sherlock BBC.
With his excellent trick, Sherlock was success to prove that he has a younger sister that was hide by Mycroft. Sherlock, Watson, and Mycroft must solve the puzzle that given by Eurus. The puzzle was so difficult, even Sherlock (that imagine was so genius by the author) was frustation to solve the puzzle.
In this episode, the writer shows the Sherlock's "humanity". Take a look to the picture below.
In this scene Sherlock was so panic knowing John was in the bottom of a well. In pict (2) Sherlock hug his sister. We can see Sherlock's parents in this episode. They came to Sherrinford, after Mycroft explain about Eurus case.
This movie will be a nice closing of Sherlock BBC series (otherwise there will be season 5). All of the mystery was cleared in this episode, like "are there just two holmes in this world?" or "who is the parents of the genius Sherlock?" even "the last Mary watson's message" were answered. But, at the end of the episode we is being curios with the scene where Sherloxk receive SMS from a woman that being fathomed as Irene Adler.
So, is there will be Sherlock season 5? If yes, will this season explain the continuance about Sherlock love story with Irene Adler (the one and only woman admire by Sherlock!).
This movie is fit for you who likes detective or mystery. If you watch this movie, you must adapt with Sherlock's fast speaking style when he explain his deduction, also this will train your thinking speed XD. Happy watching~