After crossing paths with a vengeful group of survivors, Ellie's fighting spirit draws unwanted attention from their leader; still battling for his life, a weakened Joel faces off with a hunting party out for blood.
Following a mysterious and catastrophic incident in the precinct, Bright faces an internal affairs review as Gil and the team worry about his mental health.
A killer is targeting anyone involved in one of Holmes' previous cases in London, and a former protégé arrives with a dire warning. Watson learns that Kitty carries a life-altering secret.
Watson works with Kitty to prove that a series of murders are connected to a government conspiracy spanning the globe. Kitty's news puts a strain on her relationship with Holmes.