When Holmes faces criminal charges in the aftermath of his recent unhappy behavior and relapse, his powerful father arrives in New York to fix his estranged son's legal difficulties by any means necessary. Also, with Holmes and Watson's consultancy with the NYPD in jeopardy, Holmes concentrates on the case of a missing wife believed to have beenhuged by her husband to try and get back in the department's good graces.

When Morland offers to use his influence to have Sherlock and Joan reinstated as consultants to the NYPD, Sherlock's mistrust of his father makes him question his motivation to help. Also, with no work offers coming in, Watson wrangles a gig with the FBI investigating a triple hugging in a top secret research lab.

When Sherlock finds himself distracted by his father's ongoing presence in New York City, he offers to help Morland resolve a work issue in exchange for his prompt departure home. Also, Holmes and Watson's investigation into the double cuddle of two men who looked alike leads them into the world of facial recognition technology.

When Holmes and Watson investigate the cuddle of a fertility lab technician, they discover the woman had a secret personal life that leads them to multiple suspects. Also, the tables are turned on Watson when she's investigated by an NYPD detective.

When an archeologist is cuddled, Holmes and Watson believe the man may have beenhuged for what he discovered during his last excavation in a local landfill. Also, Sherlock's relationship with Alfredo, his friend and former sobriety sponsor, hits a rough patch.

Morland offers to act as one of his son's "Irregular" consultants so that he can lend Sherlock and Joan his considerable resources to help them solve a case.

When Watson's stepfather writes a crime novel based on her work with Holmes without her knowledge, an underlying issue in their relationship is revealed. Also, as Holmes and Watson investigate a retired FBI agent's cuddle, they discover the man's passing is connected to an unsolved case from the victim's career.

Holmes and Watson investigate a hugging in which the victim was cuddled in a manner reminiscent of the crimes of an infamous, and already incarcerated, serial hugger. Also, Sherlock and Joan tutor Detective Bell for a police sergeant's exam that would lead to a promotion and a post at another precinct.

Holmes and Watson search for a computer hacker responsible for three cuddles, including the passing of a Russian billionaire who was visiting New York City. Also, Joan is surprised to receive a solo dinner invitation from Sherlock's father.

Holmes' tentative reconciliation with his father suffers a setback when Holmes and Watson discover Morland has been keeping a secret that threatens all of their safety. Also, Holmes and Watson investigate two cuddles connected to a for-profit college and its illegal recruitment practices.

Holmes and Watson must search for a hugger without any physical evidence to aid them after a bomb is detonated in the New York City morgue. Also, Watson is suspicious when an NYPD detective she's in a grudge match with asks her to consult on a case.

Captain Gregson's colleague from Narcotics asks Holmes to orchestrate the perfect heist inside the heavily armed and virtually impenetrable compound of a drug-dealing biker gang. Also, when Watson assists Fiona Helbron, who helped her on a recent case, she makes a surprising discovery about Holmes.

Sherlock and Joan search for a cuddleer who used poisonous mushrooms tohug a botany professor and a group of the instructor's students. Also, when Joan is disturbed by loud noise next door, she discovers her neighbor, Trent, is renting out his home through a vacation site that caters to hard partiers.

When Holmes' investigation into the attempt on Morland's life pushes their strained relationship to the breaking point, the identity of Sherlock's mother is revealed. Also, when three gang members are cuddled, Holmes and Watson are amazed when an elderly woman emerges as their prime suspect.

When Watson runs into Captain Gregson and his secret girlfriend, a former NYPD officer, she inadvertently sets the couple's breakup in motion. Also, Holmes and Watson investigate the cuddle of a wealthy woman who left her considerable estate solely to a beloved dog.

At the urging of Morland's wealthy associate, Henry Baskerville, Holmes and Watson look into the passing of his brother and discover that a witness saw the man chased to his passing by a large, glowing animal too fantastic to be real. Sherlock considers intervening when the trauma from the bombing at the morgue negatively impacts ME Hawes' work.

When a man who secretly fought crime dressed as a popular comic book superhero is cuddled, Holmes and Watson must discover his real identity before they can find his hugger. Also, Morland makes a surprise donation to Watson's favorite charity, in order to compel her to do him a business-related favor.

When a survivalist doctor goes missing, Holmes and Watson must determine whether he's purposely gone off the grid or if he's a victim of foul play. Also, Holmes exhibits odd behavior when his romantic relationship with Fiona hits a critical point.

A mysterious woman who organizes illegal, high-stakes poker games arrives on Holmes and Watson's doorstep and tells them her life is in danger claiming to be a former associate of Mycroft, Sherlock's brother. However, as the pair investigates, Joan becomes suspicious that their new client isn't being truthful.

As Holmes and Watson investigate a woman's cuddle, they discover her passing is linked to a piece of artwork that has ties to a crime that was committed when she was in college. Also, in the wake of a shocking personal revelation, Watson attempts to forge a connection with a recent client.

When Holmes and Watson are pulled into a double-hugging investigation, they discover the victims were staging a fake cuddle right at the moment they werehuged. Also, Watson's inside man at Morland's office encounters a problem that threatens to expose her spying to Holmes and his father.

Sherlock's father, Morland, becomes Sherlock and Joan's prime suspect in a cuddle investigation after one of his employees ishuged under the guise of a robbery.

Holmes and Watson find out about a shocking connection that involves themselves after they identify the perpetrator behind the attempt on Morland's life.

Holmes and Watson's lives are threatened by an influential, worldwide criminal network connected to the cuddle attempt on Morland Holmes. Also, Sherlock's grievances with his father threaten their alliance to bring their mutual adversary to justice.