Unforgotten London police detectives Cassie Stuart and Sunny Khan investigate historic cold cases involving missing persons, murder and long-hidden secrets. Details Casts Videos Galleries Posters Season Lists Title Unforgotten Genres Drama Crime Mystery First Air Date 2015-10-08 Last Air Date 2023-04-03 Episode Runtime 00 Hours 46 Minutes Total Season(s) 5 Total Episode(s) on All Seasons 30 Runtime 46 Production Companies Mainstreet Pictures Sanjeev Bhaskar... DS Sunil 'Sunny' Khan... Sinéad Keenan... DCI Jessica 'Jessie' Jame... Carolina Main... DC Fran Lingley... Jordan Long... DS Murray Boulting... Pippa Nixon... DC Karen Willetts... Georgia Mackenzie... Dr. Leanne Balcombe... Ian McElhinney... Lord Tony Hume... Hayley Mills... Lady Emma Hume... Martina Laird... Ebele Falade... Max Rinehart... Karol Wojski... Rhys Yates... Jay Royce... Bryony Hannah... CATH... Unforgotten | ITV (Trailer) Unforgotten | Series 1 | ITV (Trailer) Original Size (1280x720) Original Size (1920x1080) Original Size (3840x2160) Original Size (2560x1440) Original Size (1920x1080) Original Size (3840x2160) Original Size (3840x2160) Original Size (3840x2160) Original Size (1920x1080) Original Size (1920x1080) Original Size (1920x1080) Original Size (1920x1080) Original Size (3840x2160) Original Size (1920x1080) Original Size (1920x1080) Original Size (960x1440) Original Size (960x1440) Original Size (670x1005) Original Size (1000x1500) Original Size (680x1000) Original Size (1000x1500) Original Size (680x1000) Original Size (680x1000) Original Size (680x1000) Original Size (2000x3000) Original Size (1000x1500) Original Size (2000x3000) Original Size (720x1080) Original Size (1055x1500) Original Size (680x1000) Original Size (1333x2000) Season 1 6 Episode(s) 2015-10-08 Season 2 6 Episode(s) 2017-01-05 Season 3 6 Episode(s) 2018-07-15 Season 4 6 Episode(s) 2021-02-23 Season 5 6 Episode(s) 2023-02-27