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 discover the perpetrator behind the attempt made on Morland's life and find a shocking connection to themselves.
Holmes suspects his father of murder after one of Morland's employees is killed under the guise of a robbery.
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 mysterious woman who claims to be a former associate of Sherlock's brother tells Holmes that her life is in danger. It's soon revealed that the woman runs illegal, high-stakes poker games. As Holmes and Watson investigate, Joan becomes suspicious that their new client isn't being truthful.moreless
Holmes and Watson investigate a woman's murder and learn her death is linked to a piece of artwork that has ties to a crime that was committed when she was in college. Meanwhile, Joan tries to forge a connection with a recent client in the wake of a shocking personal revelation.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
Holmes and Watson investigate the murder of a man who secretly fought crime dressed as a comic book superhero. Meanwhile, Morland makes a surprise donation to Watson's favorite charity, in order to compel her to do him a business-related favor.moreless
At the urging of Morland’s wealthy associate, Henry Baskerville, Holmes and Watson investigate the bizarre death of his brother who was reportedly chased to death by a large, glowing animal too fantastic to be real. Trauma from the bombing at the morgue begins to negatively impact ME Hawes’ work.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
The identity of Sherlock's mother is revealed and his strained relationship with Morland reaches a breaking point. Meanwhile, an elderly woman emerges as the prime suspect in the murders of three gang members.moreless
Holmes and Watson search for a murderer who used poisonous mushrooms to kill a botany professor and a group of the instructor's students. Meanwhile, Joan learns that her neighbor is renting his home through a vacation site that caters to hard partiers.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 search for a killer without any physical evidence to help them after a bomb explodes in the New York City morgue. Meanwhile, Joan grows suspicious when a detective she is in a grudge match with asks her to consult on a case.moreless
Holmes' relationship with his father suffers a setback when he discovers Morland has been keeping a secret that threatens their safety. Meanwhile, Sherlock and Watson investigate two murders linked to a college and its illegal recruitment practices.moreless
A young man dies in a haunted house attraction and Carrie and Al investigate, finding a world of high-stakes video games and, in the process, hi-tech corporate espionage.
Captain Russo is suspected of murder and Carrie and Al begin a game of cat and mouse with a crooked cop.
Carrie and the team investigate the possibility that a family man turned assassin may have been mind controlled. During the investigation, the M.O.is linked to previous killings.
A cold case gets a hot lead and Carrie and Al pursue two con artists.
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
An aerospace engineer is murdered and suspects abound. The investigation reveals a secret project she was working on.
With a major storm brewing, Carrie and Al arrest a mobster and his accountant for a killing a girl found dead on the beach. With all communication down due to the storm, they take cover at a mostly-abandoned precinct.moreless
Holmes and Watson investigate a homicide in which the victim was murdered in a manner reminiscent of crimes committed by an infamous and already incarcerated serial killer. Meanwhile, Bell gets tutored by Sherlock and Joan for a police sergeant's exam that could lead to a promotion and a post at another precinct.moreless
The son of a prominent scientist is kidnapped, but the investigation reveals a deeper plot for revenge.
Watson is enraged when her stepfather writes a crime novel based on her work with Holmes without her knowledge. Meanwhile, Sherlock and Joan investigate a retired FBI agent's murder and learn the man's death is linked to an unsolved case from the victim's career.moreless
A quick mart robbery goes wrong and a tabloid cameraman is killed, but Carrie and Al discover is it a cover-up for something bigger.
The murder of an architect leads the Major Crimes team to Atlantic City.
Morland offers to act as one of Sherlock's "Irregular" consultants to help his son and Joan solve a case.
After Major Crimes links the murders of a deli employee and a computer hacker, Carrie goes undercover to get close to a French securities dealer who may be behind the murders.
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