The Traitors US reaches its climax on BBC Three at 9pm, with host Alan Cumming overseeing a murderous, over-the-top finale. The American version has proven a fun watch, featuring OTT celebrities and Cumming's outlandish wardrobe choices. In the finale, 'Housewife Slayer' Rob aims to introduce singer Eric to his murderous ways, while former figure skaters Tara and Johnny reveal their hidden friendship. Ex-Love Islander Maura Higgins, pride of Ireland, must wise up about the Traitors' identities before becoming one of their last victims.
The Marlow Murder Club
On U&Drama at 8pm, viewers can catch up with the cosy mystery drama based on Robert Thorogood's novel. When retired archaeologist Judith Potts (Samantha Bond) hears a gunshot, she teams up with the vicar's wife and a dog walker to investigate.
Who Do You Think You Are?
BBC Two at 9pm features actor Ruth Madeley, who comes from a family of proud Mancunians. They are astonished to discover that Ruth's grandmother was adopted, with roots in Peckham. Ruth, somewhat disappointed, takes the train to London ('I knew that's where I'd end up!') to learn the full story. Have tissues ready for the final revelations.
Cornwall: A Year By the Sea
On Channel 5 at 8pm, Ron, a custodian of the Padstow farm his family has worked for over 150 years, sees his son Ross catering to a new clean-eating generation by hosting restaurant-style feast nights using produce grown entirely on the land. Elsewhere, fisher Martin Murt thinks he has cracked a method of catching scallops using experimental underwater lights.
Garbo: Where Did You Go?
Sky Arts at 9pm presents Lorna Tucker's feature documentary, first released last year, retracing Greta Garbo's rise from a Stockholm slum to Hollywood. Her own letters suggest she was a reluctant star, but there are nice hints of silliness and fun.
The Accused: Beyond Reasonable Doubt?
Channel 4 at 10pm concludes a spare and unsensationalised crime series about possible miscarriages of justice. In 2012, ex-firefighter David Bryant, a well-liked figure in Christchurch, Dorset, was accused of a sexual assault dating back to the 1970s. He insisted he was innocent but was later convicted and endured what he called 'a living hell'.
