Sherlock and Joan question how well they know Shinwell when they investigate the possibility he may have gotten away with the unsolved murder of his friend, a fellow gang member. Also, Sherlock and Joan's latest case puts them on the hunt for a treasure map rumored to lead to a fortune in pirate's gold hidden around New York City.
Did You Know?
The source code shown when Mason identifies John Neligan is part of the source code of the programming language "Perl" See more
When Watson walks into the front parlor for a conversation with Sherlock, he closes a book he is reading. The shot moves to Watson, but just a moment later Sherlock once again closes the same book before he speaks. See more
References Raiders of the Lost Ark