Instinct follows a former CIA operative who is lured back to his old life when the NYPD needs his help to stop a serial killer. Dr. Dylan Reinhart is a gifted author and university professor living a quiet life teaching psychopathic behavior to packed classes of adoring students. But when tenacious top NYPD detective Lizzie Needham appeals to him to help her catch a serial murderer who is using Dylan's first book as a tutorial, Dylan is compelled by the case and comes out of retirement. Helping them is Julian Cousins, Dylan's invaluable CIA comrade who rivals Dylan in brilliance and wit, and can get top-secret dirt on anyone, anywhere, anytime. Lizzie's boss, Lt. Jasmine Gooden, is glad to see her best detective finally agree to work with someone on a case, since Lizzie has refused any partner since a tragic event one year ago. But as Dylan feels reenergized tapping into his old skill set, his husband, Andy, is concerned that Dylan's breaking their pact about putting away his cloak and dagger for good. Though Dylan and Lizzie initially clash, when it comes to catching killers, they realize they will make an ideal team if they both trust their instincts.
Former CIA operative Dr. Dylan Reinhart is lured back to his old life when NYPD detective Lizzie Needham needs his help to stop a serial killer.
Although Dylan has returned to teaching, Lizzie calls upon his expertise with profiling sociopaths to assist with a bizarre case in which a venture capitalist was murdered and his body ritualistically displayed.
The murder of a young man who recently left his family's religious community leads Dylan and Lizzie to a series of possible suspects, including a short-tempered photographer and a mysterious girl with amnesia. Also, Lizzie's younger sister, Katie, unexpectedly drops by for a visit.
Dr. Dylan Reinhart and Det. Lizzie Needham are reassigned to a murder case in Central Park when their investigation into a chemical attack on the subway is taken over by an FBI team led by Dylan's estranged father, Roger. However, Dylan can't shake the feeling that the cases are related.
Dylan and Lizzie investigate the murder of a Jane Doe, but when they realize that the victim was killed by mistake, they must identify the killer's motive and intended target before she suffers the same fate.
Dylan and Julian go undercover in a hospital when they suspect an "angel of death" is killing people with non-life-threatening ailments. Also, Lizzie asks Andy for his legal expertise when a personal trainer sues her for accidentally injuring him.
Dylan and Lizzie are under pressure to deliver results when they investigate the death of Jasmine's friend, the owner of a professional basketball team who died when her car went off a bridge.
When a woman is shot outside a community center, Dylan and Lizzie are challenged by the mayor to solve the case in less than 24 hours to quell pressure from the media and special interest groups.
Dylan and Lizzie work to uncover who would want to murder an acting troupe of costumed characters when two members are killed using highly sophisticated poisons. Also, Andy encourages Dylan to accept an invitation to a BBQ being thrown by Det. Fucci when he becomes concerned that Dylan isn't fitting in with his new colleagues.
When Celia Baxter, a successful author, is almost killed in her home, Dylan and Lizzie's suspect list includes several people who may have held a grudge as she rose in stature in the publishing world. Also, Lizzie gets closer to learning the truth about the death of her fiancé, who was killed while undercover.
Dylan and Lizzie are unable to identify a motive or connection when several average people blow themselves up using suicide bombs. Also, Julian, concerned that Dylan could be exposing himself to past enemies, enlists Lizzie to talk him out of hiring Ashley, a publicist.
Dylan and Lizzie investigate the murder of a film student whose death was broadcast for the world to see. Also, Andy and Dylan realize that parenting is tougher than they thought when they agree to look after Madison, a friend's 12-year-old daughter.
Dylan and Lizzie investigate the murder of Joan's protégé, Kristy, uncovering long-buried secrets worth killing over. Also, Dylan and Andy apply to adopt a child, and Lizzie's reliance on Julian's illicitly obtained information puts a promotion in jeopardy.
Dylan and Lizzie investigate the murder of a successful businesswoman who attempted to prolong the lifespan of humans. Also, Dylan and Andy look to continue their adoption search, and Detective Ryan Stock from Nebraska arrives to hunt for a potential serial killer.
Dylan and Lizzie investigate the murder of an aspiring musician who was gunned down on a roller coaster at an amusement park. Also, Lizzie exhausts herself trying to keep up with a newly single friend, and Andy and Dylan look to broaden their options for adoption.
Complete episode guide for Instinct with detailed information about every season and episode including air dates, summaries, ratings, and streaming availability in United States.
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Lizzie and Dylan work a case that provokes deep emotions for them when a 9-year-old boy goes missing on the eve of a judge's decision in a bitter custody battle. Also, with Dylan's help, Lizzie confronts some of her past childhood demons, and a major advancement presents itself in Dylan and Andy's adoption search.
A Sweet 16 celebration turns into a crime scene when the birthday girl's stepmother falls to her death and the guests and staff are put under a microscope by the NYPD. Also, Ryan finds a new lead in his investigation, and Lizzie receives some positive news at the precinct.
Dylan and Lizzie investigate the case of a prominent divorce lawyer who is found murdered in a bizarre ritual. Also, Dylan and Andy hit a bump in their adoption process; Lizzie and Julian reach a tough point in their relationship; and Ryan Stock's serial killer case escalates.
Dylan and Lizzie investigate when a street artist's work is found with a victim's body in the middle of it. Also, Ryan catches a suspect in the Sleeping Beauty Killer investigation and Dylan's new book editor, Harry Kassabian, pays him a visit.
Dylan and Lizzie go undercover in New York's erotic underworld when they investigate the murder of a high-powered public relations rep. Also, a glamorous love from Julian's past comes back into his life with a proposal he can't resist.
Dylan and Lizzie work to uncover why an Olympic-hopeful figure skater is killed while on the ice. Also, Ryan's case heats up and lands him and Dylan in unusual circumstances and Julian comes to understand why an old acquaintance has returned to New York.
It's all hands on deck to track down the Sleeping Beauty Killer when Ryan and Dylan's biggest lead in the case takes them to a faceoff aboard a ship. Also, Dylan receives troubling news from his father.
Dylan and Lizzie investigate deaths of three family members who were also business partners in a craft brewery. Also, Andy's legal expertise is needed when he and Dylan confront an issue in their adoption process, and Lizzie learns some hard truths about Julian's past.
A gruesome discovery in a city pond leads Dylan and Lizzie to investigate a young man's murder.