Joan worries Sherlock’s sobriety is at risk when she learns he has been lying to her about attending recovery meetings. 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.

The episode was rated 7.64 from 2940 votes.

Holmes and Watson investigate a mass murder when a chef and his patrons are poisoned with snake venom. Detective Bell’s crush on a work colleague makes Holmes realize his and Fiona’s relationship is at an important crossroads.

The episode was rated 7.64 from 3031 votes.

Holmes learns a secret about Captain Gregson’s girlfriend when she hires him for a case she wants kept off of Gregson’s radar. Holmes and Watson join the NYPD’s search for an abducted woman.

The episode was rated 7.66 from 3057 votes.

When Watson is implicated in a DEA investigation into doctors writing illegal prescriptions, she and Holmes search for the person using her medical license to sell drugs.

The episode was rated 7.66 from 2909 votes.

Captain Gregson lobbies to include Holmes and Watson when his unit is selected to receive a city commendation for its exemplary work. As Holmes and Watson consult on the investigation into a financial analyst’s murder, they are drawn into the world of asteroid research.

The episode was rated 7.67 from 2934 votes.

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. Watson debates whether a personal favor Shinwell asks of her is outside her comfort zone.

The episode was rated 7.68 from 3106 votes.

Holmes and Watson investigate a murder that puts them in the crosshairs of one of New York City’s deadliest gangs. Also, Holmes’ behavior becomes increasingly erratic when he secretly interacts with a mysterious woman.

The episode was rated 7.68 from 2716 votes.

Holmes and Watson race to find a woman who’s been held captive for years before the kidnapper takes drastic steps to avoid being caught. Watson becomes frustrated when Shinwell refuses to focus on his informant training with her and Holmes.

The episode was rated 7.68 from 2938 votes.

Holmes and Watson get mixed up in murder and magic when they investigate the death of a magician killed while performing a classic stunt. Also, Watson suspects Bell is being targeted by the ex-husband of his girlfriend, Chantal, after a false allegation lands him the middle of an Internal Affairs investigation.

The episode was rated 7.68 from 2757 votes.

When Detective Bell’s girlfriend, Chantal, is assaulted and her ex-husband is killed soon after, in what Holmes and Watson discover is a staged suicide, they search for one suspect behind the linked crimes. Also, as Bell fights the urge to seek his own brand of justice for Chantal, Sherlock makes a heartbreaking realization about the detective’s past.

The episode was rated 7.72 from 2737 votes.

When Shinwell comes to Holmes and Watson for help after he’s framed for a gang killing, they have three days to find the real murderer before he is arrested and sent back to jail.

The episode was rated 7.74 from 2962 votes.

In the conclusion, Joan and Kitty try to prove that a string of murders, stemming from an old case Sherlock and Kitty solved in London, is connected to an international government conspiracy with the Defense Intelligence Agency at its center. Sherlock and Kitty’s relationship is strained after she shares life-changing news.

The episode was rated 7.75 from 2962 votes.

A man takes hostages, including Joan, and threatens to execute them unless Holmes finds the person responsible for the death of his son. As Sherlock investigates, the captor gives him 16 hours to find the perpetrator before the statute of limitations on the crime runs out.

The episode was rated 7.77 from 2914 votes.

Holmes' former protégé, Kitty Winter, returns to New York after a three-year absence to warn him that a killer is eliminating everybody involved with a case they worked on together in London. Watson discovers that Kitty has a life-changing secret.

The episode was rated 7.80 from 3051 votes.

Holmes and Watson pursue an elusive criminal as a gang war erupts in New York City. While the NYPD works to contain the violence, the two investigate the murder that appears to have ignited the city-wide conflict, and discover that a familiar face is pulling the strings.

The episode was rated 7.90 from 2739 votes.