Holmes and Watson face their greatest challenge when a murder investigation threatens to destroy their partnership.
Elementary episode guide
Holmes and Watson's deadly conflict with Sherlock's former friend intensifies when their newest victim appears to be the serial killer's latest prey.
Holmes and Watson race to locate a missing woman; Holmes' friend becomes the prime suspect in the woman's disappearance.
Eccentric Sherlock Holmes solves crime in present-day New York with his companion, Dr. Joan Watson.
The murder of a robotics engineer may be connected to his groundbreaking secret research in teleportation; detective Bell is shut out of a required class he needs to complete his degree and join the U.S. Marshal Service.
An investigation into the murder of a religion professor puts Holmes and Watson on a hunt for a killer connected to the occult; the duo consider replacements for Detective Bell after finding he may be asked to join the U.S. Marshals Service.
Holmes and Watson race to help detective Bell when he becomes a victim of a bioterrorism attack at the precinct; while quarantined, Capt. Gregson and detective Bell begin to suspect they are trapped inside with the perpetrator.
Detective Bell considers leaving the NYPD after he is recommended for a once-in-a-lifetime career opportunity; Holmes and Watson investigate the disappearance of a young woman who led a double life as a financial dominatrix.
Holmes engages an old foe to protect his father after he learns Morland is in danger; Holmes and Watson search for a killer connected to the tobacco industry.
Sherlock and his father attempt to repair their relationship upon learning of a death within their family; Holmes and Watson search for a killer who tried to mummify his victim.
A former sobriety sponsor asks Holmes for help with an illegal endeavor to save his brother; Holmes and Watson investigate the poisoning of a biology professor.
Holmes and Watson are on the hunt for a serial killer after a murder rocks their inner circle; Holmes' neurological recovery regresses and his sobriety wavers as his commitment to catching the killer grows into an obsession.
Holmes and Watson get involved with nuclear security when they investigate the murder of a former Japanese crime syndicate gang member; Capt. Gregson is blindsided by a stunning personal confession from his daughter, a police sergeant.
Holmes and Watson retrace Holmes' steps after Holmes finds himself in possession of a severed head and can't remember anything about the last six hours.
Watson considers a major life change after reading her own therapy file while she and Holmes investigate the murder of her former psychologist.
Holmes and Watson investigate a case in which the victim was killed during a Revolutionary War re-enactment; Holmes grows frustrated with the length of his cognitive recovery; he finds solace in his growing friendship with Michael.
Watson and her half sister have conflicting reactions when their estranged father dies; Holmes and Watson hunt for a stolen plutonium shipment they fear will be used to make a dirty bomb.
As Holmes struggles with a medical diagnosis that threatens his career and sobriety, he meets a man who credits Sherlock for helping him conquer his own addiction; Holmes and Watson are hired by a reformed party girl heiress.