Plot Synopsis

Stone-cold cases of murder test the wits of crime-solving duo DCI Cassie Stuart and DS Sunny Khan. Season 1 opens with a human skeleton found beneath a basement. The remains could be centuries old -- or four decades, as comes to light upon further investigation of the crime scene. Cassie and Sunny eventually discover the victim was a young man, Jimmy Sullivan and his nearly -- disintegrated pocket diary leads the detectives to a list of names that may hold the key to solving the murder. The list of names includes Sir Phillip Cross, a mobster who bribed his way into the aristocracy; Father Robert Greaves, a beloved vicar with a dark secret; Lizzie Wilton, a reformed skinhead; and Eric Slater, an elderly, disabled bookkeeper taking care of his wife, Claire, who is suffering from dementia. They lead very different lives, but something links them, something that explains Jimmy's final resting place and the torture marks found on his bones. Season 2 starts innocently enough with a routine river dredging operation. When the scoop brings up a soggy, old suitcase, the workers open it and find a corpse sealed up so long that the tissues have turned to a soapy substance. Gruesome forensic work identifies the victim as David Walker, a businessman missing for 25 years. Cassie and Sunny locate Walker's wife, Tessa Nixon, now remarried. A hard-bitten DI herself, Tessa reminds her fellow police officers that "63% of all murder victims are killed by their partners." But Cassie and Sunny have other suspects to consider. A pager found with Walker's remains leads them to Sara Mahmoud, a Muslim teacher who wishes she'd never heard of David Walker. Other clues connect Walker with Colin Osborne, a gay attorney in the process of adopting a young girl with his partner; and Marion Kelsey, a harried nurse in a children's cancer ward. PBS aired the U.S. premiere of UNFORGOTTEN on Sunday, April 8, 2018 at 9pm (check local listings).

Season 4 of UNFORGOTTEN made its U.S. debut on Sunday, July 11, 2021 at 9pm on PBS (check local listings). The new season opens when parts of a body are found. The team believes the remains have been stored for a long time. After deciding to retire, Cassie learns she must complete 30 years of service to receive her pension.

The fifth season of UNFORGOTTEN made its U.S. debut on Sunday, September 3, 2023 at 9pm on PBS (check local listings). DCI Jessica James' first day in her new job is marred by an unforeseen and devastating event involving her family life. Her first case looks like a murder dating back to the 1930s, but could the body have been disposed of in more recent times? There are baffling questions that need answering and Jess will need to be at the top of her game.
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On Sunday, October 8, 2023 at 9pm (check local listings), PBS aired the U.S. debut of the Season 5 finale of UNFORGOTTEN. In the season ender, can Sunny, Jess, and the team bring the clues in the case together and unravel the secrets to solve it?