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Masterpiece: Unforgotten Season 4 Premieres July 11
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In the series' most dramatic season, Cassie and Sunny investigate a cold case with alarming links to the police force. Can the force ever really be trusted, and will Cassie and Sunny find themselves on the wrong side of the law?

Sundays at 8 pm, beginning July 11, on Nine PBS and livestream.

Stream after broadcast on the PBS Video App or online.


Official Teaser


The most dramatic season yet begs the question: who exactly is fighting for justice?

Episode Guide:

Season 4: Episode 1 - 7/11/2021
Parts of a body are found in a scrapyard. Meanwhile, after making the decision to retire from the police force, Cassie faces a dilemma.

Season 4: Episode 2 - 7/18/2021
Cassie and Sunny identify four potential suspects and decide to go public about the discovery of the remains.

Season 4: Episode 3 - 7/25/2021
Cassie and Sunny interview the suspects, who all deny knowing the victim. Collier manages to locate the rest of Walsh's body.

Season 4: Episode 4 - 8/1/2021
Cassie and Sunny discover Walsh was chased by all four suspects on the night in question. The pathologist identifies the cause of death.

Season 4: Episode 5 - 8/8/2021
Cassie and Sunny get closer to the truth of what happened. Unexpectedly, things take a devastating turn for Cassie.

Season 4: Episode 6 - 8/15/2021
Despite a tragic turn of events, the team narrows down the suspects. Will they succeed in bringing Walsh's killer to justice?