The Guardian's "TV tonight" column previews the evening's television highlights, led by the finale of The Traitors US on BBC Three at 9pm. Hosted by Alan Cumming, the American version has drawn attention for its flamboyant celebrity cast and the host's eccentric wardrobe, and the column asks whether former Love Islander Maura Higgins can identify the Traitors before she is eliminated.

Alongside the reality climax, the round-up recommends several other programmes: the cosy mystery The Marlow Murder Club on U&Drama (8pm), an emotional episode of Who Do You Think You Are? featuring actor Ruth Madeley on BBC Two (9pm), Channel 5's Cornwall: A Year By the Sea (8pm), the documentary Garbo: Where Did You Go? on Sky Arts (9pm), and the concluding part of Channel 4's miscarriage-of-justice series The Accused: Beyond Reasonable Doubt? (10pm).