Sanjeev Bhaskar

Unforgotten's Season 4 finale finally closes the casebook of Cassie Stuart.

The penultimate episode of Unforgotten Season 4 is a reminder that every chance you take, you take it on the road.

As Unforgotten Season 4 reaches the halfway mark, it's time for the series' patented Episode 4 Second Body Twist to refocus the case.

Unforgotten's third episode brings Stuart's team face to face with all four suspects despite the department's hesitation to continue investigating.

Unforgotten brings up the specter of an inside job in the second episode as Cassie admits this time, it's personal.

Unforgotten Season 4 returns with a whole new case for Sunny and the team to tackle, as Cassie Stuart faces having to return to the force after the events of Season 3.

The truth comes out in the Hayley Reid case in Unforgotten's Season 3 finale, but it turns out her death was always the tip of a much larger iceberg.

Unforgotten might have found their final suspect in the Hayley Reid case, but not before losing one first.