Curtis and Briscoe's investigation into the death of a horse leads to a killer who may target more than animals.
Lucca defends a TV writer-producer in a copyright infringement case with ties to the President of the United States. Mike Kresteva takes aim at Reddick, Boseman & Kolstad.
After receiving information from Sebastian Moran (Vinnie Jones), Sherlock resumes his search for Moriarty.
A couple who refused treatment on religious grounds for their gravely ill child are charged with murder later.
Julie and Billy book a gig at The Cutting Room, but Billy's newfound obligation to family threatens to compromise their big break.