Poisoned: Killer in the Post
9pm, Channel 4
On New Year’s Day 2023, 25-year-old Imogen “Immy” Nunn’s body was found in her Brighton home, after she had consumed a poison bought online via a suicide forum. This unsettling two-part documentary shows that Immy was one of many who had used the sites. It looks at the devastating conversations in the forum and meets the families of other victims, with one father reading his son’s last posts and the replies from users who cheered him on as he was dying. It then follows the Times journalist James Beal’s efforts to find a man accused of shipping this lethal poison globally, which culminates in Beal going undercover and meeting him face to face. (The man is now awaiting trial in Canada over similar allegations.) Hollie Richardson
Plunderer: The Life and Times of a Nazi Art Thief
7.20pm, PBS America
Bruno Lohse was a Nazi art dealer who was in charge of looting masterpieces from Jewish people for Hermann Göring. He spent a brief spell in jail, but was released to continue his career in the art trade. Prof Jonathan Petropoulos investigates his story. HR
Can’t Sell, Must Sell
8pm, Channel 4
The endless booby traps embedded within the UK housing market continue to give rise to new TV variants. In this series, the sibling property developers Stuart and Scarlette Douglas help homeowners sell seemingly unsellable properties. They are in West Sussex confronting challenging market conditions and equally problematic interior-decoration issues. Phil Harrison
Side Hustlers
8pm, U&W
Unusually, this business reality show seems more interested in mentorship than manufactured conflict. The angel investors Ashley Graham and Emma Grede offer useful advice and timely cash injections to their female-led startups. But even amid this supportive vibe, things don’t always work out – as one hustler is about to discover. Graeme Virtue
Ghosts US
9pm, BBC Three
The silly supernatural sitcom feels more like background TV than its British cousin, but it’s still plenty of fun. In this triple bill, a belated wedding gift (a children’s dinosaur bed, no less) brings the exes Isaac and Nigel back together, before Jay’s disapproving folks descend on Woodstone Manor for Christmas. Hannah J Davies
Debbie Horsfield Remembers: Poldark
10pm, BBC Four
It’s a decade since a topless Aidan Turner scythed crops on the Cornish coast – and fans’ weak knees have just about recovered. Before revisiting the opening episode, the screenwriter and executive producer Debbie Horsfield discusses how the drama won hearts. HR
Film choice
Don’t Look Now (Nicolas Roeg, 1973), midnight, BBC Two
BBC Two’s week of trying to creep everyone out before bed continues with the scariest film ever made. Nicolas Roeg’s 1973 Daphne du Maurier adaptation is a disorientating swirl of creeping dread. Donald Sutherland and Julie Christie play a grief-stricken couple who travel to Venice and find themselves plagued by malevolent clairvoyants and terrifying sightings. The final sequence, in which Sutherland follows a figure through the city, is as nightmarish as anything you will ever see. Stuart Heritage
Live sport
Women’s Euro 2025 football: England v Netherlands, 4.15pm, BBC One
The second Group D match, in which Leah Williamson will be hoping for a repeat of England’s victory the last time the sides met, in 2023. Followed by France v Wales at 7pm on ITV1.