The sixth season of "Unforgotten" opens with a chilling discovery on Whitney Marsh, where suspected human remains are unearthed. Detectives Jess and Sunny are abruptly summoned to the scene, disrupting Jess's personal plans and causing tension with her husband. Dr. Balcombe's forensic examination reveals the remains are relatively recent and gruesomely dismembered before being placed at the site. This grim detail prompts Jess and Sunny to expand their search, suspecting more body parts may be nearby, and sets the stage for a complex investigation.   As the case progresses, the narrative introduces a new ensemble of characters whose lives appear unrelated at first glance. Among them are Melinda Ricci, a fiery Irish television commentator; Martin "Marty" Baines, an autistic man living with his mother Dot in Deal, Kent; Asif Syed, an Afghan immigrant diligently preparing for his UK citizenship test; and Juliet Cooper, a poised history lecturer and university faculty head in London. Each character carries their own secrets and burdens, but their paths are destined to intersect in unexpected ways.   Jess and Sunny, along with their team, delve deeper into the mystery, peeling back layers of time and deception to uncover the hidden connections between these individuals. The investigation becomes a race against time as the detectives piece together fragments of the past, revealing long-buried truths and the shocking events that led to the murder. The season masterfully weaves together personal dramas and police procedural elements, culminating in a gripping resolution that exposes the dark undercurrents linking the suspects to the crime.