Here's why Unforgotten isn't on TV tonight and when you can watch the latest episode. Unforgotten series 3 aired back in summer 2018. UNFORGOTTEN is returning to ITV for a fourth series. Don’t worry, although the delay is frustrating you don’t have long to wait for your next instalment of Unforgotten. 21 February 2021, 18:30. The third series finished airing in August 2018 and the fourth series commissioned soon after. ITV drama Unforgotten is officially returning for a fourth series after a longer than planned hiatus. Unforgotten's Unique Pair In a world where fictional detectives are typically plagued with all manner of problems, DCI Cassie Stuart and DI Sunny Kahn are refreshingly normal. The show’s creator, Chris Lang, has said that “the primary theme of this series … In Unforgotten series four episode two, DCI Cassie Stuart and DS Sunny Khan piece together the life of a murder victim last seen more than 30 … The new series will comprise six episodes that will also be available to watch on ITV Hub. Part of the fourth series of Unforgotten … While 2020 saw plenty of TV shows filming schedules interrupted due to worldwide lockdowns, it looks like we're finally seeing the light at the end of the tunnel in 2021! Andy Nyman as Dean Barton in The Unforgotten. Series 4 starts on Monday, February 22 at 9pm on ITV. We have the lowdown on where the new season of the hit drama was filmed. Unforgotten series 3 recap: What happened at the end of the last season of ITV's Unforgotten? ... Unforgotten… Photograph: ITV Notes and observations. When is the new series of Unforgotten on TV? The hit crime drama Unforgotten returns to ITV on Monday 22 February at 9pm for its fourth series, with Cassie and Sunny back on the scene to crack some more cold cases. Unforgotten viewers are up in arms that the new series isn’t available to watch on ITV Hub. But due to the coronavirus pandemic, the fourth series only recently wrapped filming. TV review Television Unforgotten series four review – the coldest of cold cases 5 / 5 stars 5 out of 5 stars. Unforgotten Episode 3, originally scheduled to air this evening (Monday March 8) has been postponed. When is Unforgotten episode three on TV?