Sherlock is upset at not knowing who the mastermind behind the Noahtic and Drebber cases is, and takes his frustration out on John. While returning by train from an investigation, Sherlock has a chance reunion with William.
If I had killed him back there, I would have
been one step closer to a huge mystery!
!لو قتلته حينها، لكنت اقتربت خطوة نحو حلّ لغز عظيم
hätte ich diesem gewaltigen Mysterium
einen Schritt näher kommen können!
¡Sí lo hubiese matado allí,
Si je l’avais tué, je me serais
approché d’un énorme mystère !
Se eu o tivesse matado ali,
Я мог прикончить его
 и приблизиться к разгадке тайны!