Being a fan of a British series that airs in the U.S. means growing accustomed to delayed premiere dates. Such is the case for fans of ITV’s Unforgotten, which airs on PBS Masterpiece here. The detective drama debuted its sixth season in the U.K. in February — and was renewed for Season 7 right after its February 24 finale! When does Unforgotten Season 6 come out in the U.S.? And what’s to come in the new installment? We answer all of those questions here. When does Unforgotten Season 6 premiere in the U.S.? Unforgotten Season 6 premieres on Sunday, August 24, at 10/9c, PBS Masterpiece announced on Wednesday, April 30. It will be preceded by the Season 2 premiere of The Marlow Murder Club at 9/8c. Unforgotten stars Sanjeev Bhaskar as Di Sunny Khan, Sinéad Keenan as Dci Jessica Jones, who can be seen in the first photo from Season 6 above. Season 6 premiered on ITV in the U.