Watch Order (Release = Chronological)Recommended
0 / 6 watchedSix cold cases in broadcast order.
- 1 Series 1 6 episodes. Bones case.
- 2 Series 2 6 episodes. River victim.
- 3 Series 3 6 episodes. Airport road case.
- 4 Series 4 6 episodes. Cassie farewell.
- 5 Series 5 6 episodes. Jess arrival.
- 6 Series 6 6 episodes. Latest cold case.
About Unforgotten
Unforgotten follows Cassie and Sunny on cold cases with 6 episodes each series. Series 1 from 2015 sets the bones find with 4 suspects, series 2 to 4 keep the suspect wheel format with river and airport victims. Cassie’s father and son arcs run beside cases.
Series 4 from 2021 closes Cassie’s run, while series 5 from 2023 brings Jess James as the new lead with Sunny. Series 6 from 2025 keeps the cold case wheel open. Watch in broadcast order since team grief stacks directly from one finale into the next premiere.
Good to know
Watch series 1 to 6 in order with no skipping. Suspect reveals only land if you know the team, and Cassie exit needs the full run seen. Series 5 works as a new lead start after the farewell, but it assumes Sunny trust. New series keep getting discussed, so treat the show as open as of September 2026.
