Complete story — includes the ending
A severed hand is seen in a street puddle. It belongs to the corpse of Orthodox Jew Moshe Shapiro. Shapiro owned a Postal Unlimited store nearby. A hidden safe contains Moshe's ledger. Moshe turns out to have been a diamond smuggler. Sherlock deduces that weightlifter Dana Kazmir ripped the hand off. Kazmir confesses to the murder and provides a list of three other people he was supposed to kill, which includes Amit Hattengatti, the store's only employee. The NYPD intercept a cash payment to Kazmir, and the envelope matches the office supplies in Moshe's shop. Amit was actually Moshe's smuggling partner. He had plotted with Kazmir and Kazmir's corrupt lawyer to make it look like he was a murder target to deflect suspicion. (Moshe had reformed and was planning to end his smuggling operation.) Kazmir, doomed to jail anyway, lied in return for a payout for his family. Amit eventually names his diamond supplier. Meanwhile, Sherlock gets Kitty to sign a non-disclosure agreement after finding Joan's unpublished "The Casebook of Sherlock Holmes". Gregson punches a policeman, who had twice abused Gregson's daughter Hannah.
Sources and content license
Source and revision history · Adapted from Wikipedia contributors, List of Elementary episodes. HTML formatting and reference markers removed. · Content license