12. Bölüm: Holmes ve Lupin, Kara Salon tuzaklarının ve Karga'nın hazinesinin ardındaki gerçeği aydınlatır.

Lupin, Holmes, Lily, and Zenigata survive the explosion, realizing the Black Drawing Room was a booby trap. Holmes deduces that the cheap ring Faulkner always wore is the key to uncovering the treasure. That night a man steals the ring and uses it to unlock a gravestone leading to a secret passageway containing the Raven's treasure. He is cornered by Holmes, accompanied by Lily and Lestrade, and Holmes recognizes him as Eliot. A gunfight ensues and Eliot is shot by Lupin, who had followed them, telling Lily that Eliot killed her father. Holmes and Lupin surprisingly shoot at each other, and in the commotion, Lily recalls that she saw Lestrade just before her father was murdered. Holmes had actually deduced this earlier and set the trap with Lupin to expose Lestrade as the treasure hunter. Lestrade then threatens to kill everyone with two hand bombs, however Lupin reveals the Raven's treasure is merely a collection of useless WWII bombs. The frustrated Lestrade escapes and jumps into the Thames River, detonating the bombs. Afterwards, Lupin reveals Watson's final request was for Holmes to watch over Lily, and sometime later, Holmes returns to taking on more high profile cases with Lily as his partner. Lupin also meets the Baker Street boy James Morarity, who is revealed to be the mysterious "Professor", warning Lupin to stay out of his way. Lupin decides that he has had enough of London and departs. (Source: Wikipedia)

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