Complete story — includes the ending
City councilman Van Der Hoff is forced to change his vote online, then murdered through his hacked pacemaker by serial killer Daniel Gottlieb. Everyone assumes he died of a routine heart attack. Sebastian Moran offers to confess to other murders, but only to Sherlock. Eager to get back at Moriarty for betraying and continuing to try to murder him, Moran tells the detective that Van Der Hoff was one of his assigned targets. Sherlock steals Van Der Hoff's body and determines that Moran's claim is true. Sherlock looks into other well-disguised murders and catches Gottlieb. With Gottlieb's help, Sherlock finds the man who hired him has seen Moriarty, but when he goes to confront him, that man is murdered. Moran commits suicide after Moriarty sends him a coded message (via an unsuspecting Sherlock) giving him the choice between his own death and his sister's. Moriarty calls Sherlock to say he is ready to meet him.
Sources and content license
Source and revision history · Adapted from Wikipedia contributors, List of Elementary episodes. HTML formatting and reference markers removed. · Content license