Sherlock and Joan question how well they know Shinwell when they investigate the possibility he may have gotten away with the unsolved murder of his friend, who was a fellow gang member. Meanwhile, the pair search for a treasure map rumored to lead to a fortune in pirate's gold hidden in New York City.moreless
Part 1 of 2. Holmes' former protégé, Kitty Winter, returns to New York after a three-year absence to warn him that a killer is eliminating everyone involved with a case they worked on together in London, and that they're the next targets. As Sherlock, Kitty, Joan and the NYPD join forces to find the perpetrator, Watson discovers Kitty has a life-changing secret.moreless
Holmes and Watson investigate a clown's murder upstate and discover a connection between his death and the creation of a new weaponized virus. Meanwhile, Joan helps Bell when he's targeted by his new love interest's ex-husband, who is trying to sabotage her career at the District Attorney's office.moreless
Shinwell is framed for a gang killing, and Holmes and Watson have just three days to find the real murderer before he is arrested and sent back to jail.
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. Meanwhile, Bell's crush on a work colleague makes Sherlock realize his relationship with Fiona is at an important crossroads.moreless
Holmes learns a secret about Capt. Gregson's girlfriend when she hires him for a case she wants kept off of Gregson's radar. Meanwhile, Sherlock and Watson join the NYPD's search for an abducted woman.moreless
Season 4 ends with Holmes and Watson facing reprisal from the perpetrator who wants Morland dead, and realizing they dangerously underestimated the scope of their new enemy's influence.
Holmes and Watson investigate a double homicide and discover the victims were staging a fake murder at the moment they were killed. Meanwhile, Joan's inside man at Morland's office encounters a problem that threatens to expose her spying to Holmes and his father.moreless
A survivalist doctor goes missing, and Holmes and Watson must determine whether he purposely went off the gird or is a victim of foul play. Meanwhile, Sherlock exhibits odd behavior when his romantic relationship with Fiona hits a rough patch.moreless
Watson discovers Capt. Gregson's secret relationship with a former female NYPD officer and inadvertently sets the couple's breakup in motion. Meanwhile, Holmes investigates the murder of a wealthy woman who left her vast estate solely to a beloved dog.moreless
Holmes is asked by Narcotics to orchestrate a perfect heist inside the heavily armed and virtually impenetrable compound of a drug-dealing biker gang. Meanwhile, Watson assists Fiona Helbron on a case and makes a surprising discovery about Holmes.moreless
Holmes and Watson hunt for a computer hacker responsible for three murders, including the death of a Russian billionaire who was visiting New York City. Meanwhile, Joan receives a solo dinner invitation from Sherlock's father.moreless
Holmes and Watson's latest investigation involves the murder of an archeologist who they think was killed by what he discovered in a local landfill during his last dig. Sherlock and Alfredo's relationship hits a rough patch.moreless
Sherlock offers to help his father resolve a work issue in exchange for his prompt departure from New York City. Meanwhile, Holmes and Watson investigate the murders of two men who looked alike. The probe leads them into the world of facial recognition technology.moreless
Barry prepares for a mission even though his forces have been depleted. Meanwhile, Leila loses confidence in Jamal's ability to keep the family safe when hostilities reach the palace.
Jamal is feeling desperate for a military victory - no matter the cost, while Barry's attempt to rescue Daliyah goes awry.
Barry assumes a new identity and adjusts to life in his adopted village; Jamal is shocked by his connection to a war hero; Ihab and Samira change their plans to flee the country and join a group of extremists who want to invade Abbudin.moreless
Holmes and Watson investigate the death of a member of Holmes’ online beekeeping community. Captain Gregson solicits Watson's services for an off-book investigation that helps him make a life-changing decision.
Holmes and Watson investigate the murder of a professional skeptic who debunked paranormal, religious and scientific phenomenon for a living. The probe uncovers a potential threat to homeland security. Meanwhile, Gregson's daughter asks Joan for help with a case.moreless
Holmes and Watson investigate a murder where the victim was flash-frozen at the time of death. Watson's mother puts Joan in an awkward position by asking her to confront her brother about his affair.moreless
Holmes and Watson delve into the world of wrongful death compensation while they investigate a serial murderer who leaves envelopes of cash on the victims. Holmes does a kind act for Watson after she undergoes a personal crisis.moreless
Part 1 of 2. Watson begins her new job as an in-house investigator for an insurance firm, but her attention shifts when she joins Holmes to eliminate an imminent threat to Kitty.
When an NYPD officer is murdered, Holmes and Watson join the investigation. Sherlock looks for the person posting his personal statements made in sobriety meetings on a "recovery blog".
Holmes and Kitty investigate the murder of a postal store owner whose death is connected to the illegal diamond trade. Meanwhile, Gregson's career is placed in jeopardy when he hits a fellow NYPD officer.moreless
Holmes and Watson join forces to investigate a double homicide, but Kitty gets jealous of their rapport and allows it to override her better judgment in the case.
As Holmes and Watson work a standard murder investigation, they encounter MI-6 and find the case has international and political inferences. Watson re-examines her relationships with Mycroft and Sherlock.
Holmes and Watson chase the source of a lethal toxin after a pickpocket dies of anthrax poisoning.
Holmes and Watson are called in to consult when a woman, who was thought murdered by her husband years ago, appears now to be a victim of a kidnapping after her husband receives a ransom demand. Holmes and Watson are eager for Lestrade to leave the brownstone but he doesn't seem inclined to do so.moreless
As Watson peruses one of Holme's cold cases, she figures out that a rare prehistoric fossil is tied to the unsolved murder. Sherlock is in uncharted territories as concerns his duties as a sobriety sponsor.moreless
Holmes and Watson set out to determine which client killed a hedge fund manager running a Ponzi scheme. Sherlock considers becoming a sponsor for a recovering addict.