"Hang on a moment, doesn't John get a say in this?" You asked as Mycroft looks over at you.
"Or you could shoot her." He said.
"What?" John asked, angrily, as you stare at him.
"Whatever lies ahead requires brainpower, Sherlock, not sentiment." Mycroft said.
"What the hell, Mycroft?" You said, angrily.
"Today, we are soldiers. Soldiers die for their country." He said.
"Shit. He's right. I'll do it. I'll take the bullet." John said.
"Are you mad?" You ask him.
Mycroft gives a small smile, turns to Sherlock and said. "Good. Make it swift. No need to prolong his agony. Get it over with and we can get to work." John shifts on the spot and straightens up, bracing himself. Sherlock lowers his head and half-turns away.
Mycroft scoffs and starts to chuckle, sarcastically. "God! I should have expected this. Pathetic. You always wear the slow one....the idiot. That's why I've always despised you. You shame us all. You shame the family name. Now, for once in your life, do the right thing. Put this stupid little man out of all our misery." He said. John bites his lips but Sherlock doesn't move.
Mycroft rolls his eyes then turns to you. "Fine. Don't shoot Doctor Watson but how about you shoot (y/n)." He said. Sherlock looks over at his brother and glares at him.
"She's nothing more than a distraction; a little scrap of ordinariness for you to impress. And the child she's carrying will be a disgrace to the family name." He sneered.
"Please, for God's sake, just stop it!" Sherlock said.
"Why?" Mycroft asked.
"Because, on balance, even your Lady Bracknell was more convincing." Sherlock said.
Mycroft blinks and lifts his head, looking a little disappointed. Sherlock turns his head towards you and John and said. "Ignore everything he just said. He's being kind. He's trying to make it easy for me to kill him. Which is why this is going to be so much harder." He turns to Mycroft and raises the gun, pointing at him.
"You said you liked my Lady Bracknell." Mycroft said with a smile.
"Sherlock. Don't." You whispered.
Mycroft turns to you and said. "It's not your decision, (y/n)." You and John look at him as he turns back to Sherlock.
"Not in the face, though, please. I've promised my brain to the Royal Society." He said.
"Where would you suggest?" Sherlock asked him.
Mycroft starts doing up the top button of his shirt and straightens his tie as he says. "Well....I suppose there is a heart somewhere inside me. I don't imagine it's much of a target but....why don't we try for that?" He lowers his hands and looks directly at his brother as John holds his hand out towards Sherlock and said. "I won't allow this."
"This is my fault." Mycroft said as he turns to face you and John. Then he turns back over to Sherlock and said. "Moriarty."
"Moriarty?" Sherlock asked.
"Her Christmas treat: five minutes conversation with Jim Moriarty five years ago." Mycroft replied.
"What did they discuss?" Sherlock asked as he lowers the gun.
"Five minutes conversation....unsupervised." He said.
John's mouth opens and he stumbles back a step as you look over at him in shock. Sherlock sighs softly and raises the gun again. "Goodbye, brother mine. No flowers......by request." Mycroft said as he straightens up and puts his hands behind his back.
"Jim Moriarty thought you'd make this choice. He was so excited." Eurus said, breathlessly.
Then the screen switches to Moriarty's face and he begins to speak. "And here we are, at the end of the line. Holmes killing Holmes. This is where I get off." He said woth a small smirk then the screen switches back to Eurus as Sherlock, looking grim, glares at his brother.
"Five minutes. It took her just five minutes to do all of this to us " He said, through clenched teeth.
He turns his eyes towards John then over at you and the two of you lock eyes for a moment. Sherlock returns his gaze to his brother, then raises his eyebrows and shrugs, pressing his lips together for a moment before lowering the gun and turning away.
"Well, not on my watch." He said.
"What are you doing?" Eurus asked as Mycroft looks over at him startled.
"A moment ago, a brave man asked to be remembered." Sherlock said and you and Mycroft look at him, alarmed.
"Sherlock, no, please." You begged as he looks over at you and said. "I'm remembering the governor."
Holding the pistol in both hands, he lifts the muzzle and presses the end under his chin. "Ten..." He said as Eurus frowns and shouts. "No, no, Sherlock."
You place your hands over your mouth as John looks over at Mycroft then back at Sherlock.
"Nine....Eight...." Sherlock continues.
"You can't!" Eurus shouted.
"Seven...." Sherlock said.
"You don't know about Redbeard yet." Eurus said, urgently.
You, John and Mycroft stare at Sherlock in horror as he lowers his left hand, continuing to hold the muzzle under his chin with the other.
"Six...." He said.
"Sherlock!" She shouts, anxiously.
"Five...."
"Sherlock, stop that at once!" Eurus shouted in a panic.
As she yells, a small dark whizzes out of a round hole in the wall and impacts the back of Sherlock's head. He jolts and reaches his left hand round to it.
"Four...."
Another dart hits John in the back of the neck and a third one hits your neck as well. You and John reach around for it while Sherlock pulls the dart from his neck.
"Three...two..." He said, weakly, and he slowly falls backwards, pistol falling from his hand.
You and John pull the dart out of your own neck and you immediately follow suit with Sherlock and fall backwards into darkness.

YOU ARE READING
The Final Problem (Sherlock x Female!Reader)
FanfictionLong buried secrets finally come to light as someone has been playing a very long game indeed. Sherlock, (y/n) and John face their greatest ever challenge. Is the game finally over?
Chapter 7: This isn't Torture, This is Vivisection
Start from the beginning