The fourth and final season of Unforgettable an American police procedural drama television series originally aired on A&E from November 27, 2015, through January 22, 2016.
Detective Eddie Martin, Carrie's estranged husband arrives from Long Beach to assist in Major Crimes' manhunt for meth dealers who seem to have stepped up their game. E.J. Bonilla and La La Anthony joins the cast as new detective Denny Padilla and new medical examiner Delinda Michaels.
Carrie and Al must drive the star witness in a high profile fraud case to Miami, but must put up with her many eccentricities and deal with hitmen out to silence her. At the end of the episode, Eliot leaves the Major Crimes Division after receiving a promotion.
Carrie goes undercover to solve the murders of a deli worker and computer hacker, which might be connected to the past of a French securities dealer. Kathy Najimy joins the cast as Major Crimes' new commander and Al's old commanding officer, Captain Sandra Russo.
The murder of an architect sends Carrie and Al to Atlantic City, where they uncover a casino heist involving stolen blueprints and an old flame of Carrie's.
Carrie's ex-husband Eddie returns to New York just in time to assist in the murder investigation of a tabloid cameraman during a convenience store robbery.
Carrie and Al arrest a mobster and his accountant for the murder of a teenage girl at the same time a hurricane hits the coast. With all communications down due to the storm, they are forced take shelter at a mainly abandoned precinct, and protect the two from the mobster's goons who aim to rescue their boss by any means necessary.
Carrie and Al investigate the death of a young gamer in a haunted house, and uncover a plot of hi-tech corporate espionage and high stakes video gaming.
At around the same time an old colleague of Al's is murdered, an old enemy of his and Russo's is released from prison, bringing back old demons and putting both of their careers on the line.
While investigating how a family man was seemingly "programmed" into a ruthless assassin, Carrie discovers that she herself may have fallen victim to the same scheme when a part of her memory is discovered to have been falsified. At the end, Al takes Carrie to an isolated park to propose to her, but he is shot by an unidentified sniper and Carrie desperately tries to keep him alive as the series ends in an unresolved cliffhanger.
Production
Development
After being cancelled following three seasons by CBS,[9]Unforgettable was picked up by A&E for a fourth season.[10]Unforgettable was canceled after its fourth season on February 16, 2016.[11]