|Directed by||Christine Moore|
|Written by||Robert Doherty, Brian Rodenbeck|
|Air date||15 January, 2015|
|Previous||"The Eternity Injection"|
|Next||"The Illustrious Client"|
While Kitty tries to find a runaway teen, Sherlock and Joan work a case in which the murder of a brilliant bio-engineer looks to be at the hands of a drug cartel. Also, Joan makes a major life decision but worries it will impact Sherlock negatively, not knowing that Sherlock has big news of his own.