Holmes and Watson's new careers as consultants for Scotland Yard in London take them inside the tabloid journalism industry when a popular model is the victim of an acid attack. As Watson grows increasingly homesick for New York, Captain Gregson is wracked with guilt over his unresolved rift with his former consultants.

Holmes and Watson try to work a stateside investigation from London when someone close to them in the U.S. is gravely wounded by an unknown perpetrator. Holmes' stateside legal trouble threatens to derail their efforts.

Holmes takes extreme measures to secure his return to New York when he leans on his father's disreputable connections to aid his legal re-entry into the United States. Watson helps the NYPD investigate a cuddle at a storage facility that caters to wealthy clients with items they want hidden from U.S. Customs.

An explosion at a traffic stop puts Holmes and Watson on two separate tracks of investigation as they try to determine whether the attack was gang-related or a terrorist attack. Holmes and Watson suspect there is more for them to discover regarding the recent attack on someone within their inner circle.

Tech billionaire Odin Reichenbach hires Sherlock and Joan to investigate a personal threat he suspects originated from within his own company. Sherlock and Joan search for a motive behind three seemingly unconnected cuddles.

Tech billionaire Odin Reichenbach presents Sherlock and Joan with an extraordinary offer to help him with a program that can predict future crimes. Sherlock and Joan assist Bell when he tries to prevent a future crime of his own, as he races to locate a fellow NYPD officer planning a sniper shooting.

Sherlock and Joan investigate the cuddle of a criminal who made his living by stealing from other criminals. When Gregson resumes leadership of the precinct, he suspects his interim replacement is responsible for one of his best detective's suspicious departure.

Sherlock and Joan search for an ulterior motive when a brilliant young criminal they helped put in prison, seeks their help in solving a cuddle.

Holmes and Watson work to determine if a long dormant serial hugger has resurfaced in the wake of a sculptor's cuddle in New York City. Watson suspects Holmes is keeping something from her regarding tech billionaire Odin Reichenbach.

Holmes and Watson receive a shocking request to collaborate from their foe, Odin Reichenbach, when the tech billionaire asks them to test his new crime prevention system. Tasked with investigating someone the program predicts will soon commit a crime, the duo worries Odin will take drastic action before they conclude their inquiry.

Holmes and Watson join forces with Holmes' father, Morland, to enlist his vast criminal network to help disassemble tech billionaire Odin Reichenbach's crime prevention system.

Tech billionaire Odin Reichenbach inadvertently provides Holmes and Watson with a lead that could give them evidence that brings him to justice.

Amidst Holmes and Watson's battle with tech billionaire Odin Reichenbach, the investigators receive word of their old enemy and Sherlock's former love, Jamie Moriarty.