Episode 1 : Folie a Deux
When a serial bomber becomes active again after being dormant for six years, Watson seeks help from Shinwell Johnson (Nelsan Ellis), a former patient whose life she saved when she was a surgeon. Also, Holmes senses Watson is unhappy and questions whether she is still fulfilled by her detective career.
Episode 2 : Worth Several Cities
When the leader of a local street gang abducts Holmes to compel him to find the person responsible for a hit on his men, Holmes and Watson get caught in the middle of an international hunt to recover a centuries old, priceless artifact. Also, Watson debates whether a personal favor Shinwell asks of her is outside her comfort zone.
Episode 3 : Render, and Then Seize Her
Holmes learns a secret about Captain Gregson's girlfriend when she hires him for a case she wants kept off of Gregson's radar. Also, Holmes and Watson join the NYPD's search for an abducted woman.
Episode 4 : Henny Penny the Sky is Falling
Captain Gregson lobbies to include Holmes and Watson when his unit is selected to receive a city commendation for its exemplary work. Also, as Holmes and Watson consult on the investigation into a financial analyst?s murder, they are drawn into the world of asteroid research.
Episode 5 : To Catch a Predator Predator
Holmes and Watson have plenty of suspects when they investigate the murder of a man who led a secret life as a vigilante, "catfishing" sexual predators on dating sites and publicly shaming them. Also, when Shinwell's criminal record prevents him from finding a full-time job, Holmes disagrees with Watson?s plan to help him.
Episode 6 : Ill Tidings
Holmes and Watson investigate a mass murder when a chef and his patrons are poisoned after dining on a tasting menu tainted with snake venom. Also, Detective Bell's crush on a work colleague makes Holmes realize his and Fiona's (Betty Gilpin) relationship is at an important crossroads.
Episode 7 : Bang Bang Shoot Chute
Holmes and Watson search for two murderers after a base jumper is shot out of the sky by one killer, and has his parachute sabotaged by another. Also, after Joan?s sister, Lin (Samantha Quan), thinks she sees Shinwell with a member of his old gang, Joan takes drastic measures to make sure he won?t be drawn back into a life of crime.
Episode 8 : How the Sausage is Made
Joan worries Sherlock's sobriety is at risk when she learns he has been lying to her about attending recovery meetings. Also, Sherlock and Joan discover a man's death caused by ingesting poisoned sausage is connected to a lab working on a breakthrough in the artificial meat industry.