Hostage (BBC Sherlock) (Johnlock)

John Watson is devastated by Sherlock's death. He's haunted by nightmares of his suicide. But little does he know that Sherlock is truly alive, and staying at his brother's mansion, waiting for the right time to return. Suddenly, however, that time might be changed. For a new rival that guessed all along that Sherlock faked his death has a scheme to finish Moriarty's work. One that most certainly involves the dear doctor in a horrible way.