|Directed by||John Polson|
|Written by||Jason Tracey|
|Air date||November 27, 2014|
Sherlock and Kitty investigate the murder of a small postal store owner whose death is connected to the illegal diamond trade. Gregson puts his career in jeopardy when he hits a fellow NYPD officer.
- The first episode in the series in which Joan Watson does not appear due to her being in Denmark.