"Unforgotten" is a British crime drama series that first aired in 2015. The show follows DCI Cassie Stuart and DI Sunny Khan as they investigate cold cases of disappearances and murders, uncovering long-buried secrets and complex human stories. Each season focuses on a new case, delving into the lives of those affected and the ripple effects of past crimes. Praised for its nuanced storytelling and strong performances, "Unforgotten" offers a thoughtful exploration of justice, memory, and the passage of time.