TV TONIGHT: Did ‘worst traitor’ Alan Carr really get away with murder? | television

Celebrity traitors

9pm, BBC One
Is Alan Carr worse than Linda? Or will he, somehow, get away with killing his best friend Paloma Faith? Producers left us in disarray last week, as the exiled first contestant was about to be announced – but it was a showdown between Kate Garraway and Nico Omelana. However, if Kate survives, it will be ironic as she watches the suspicious Tom Daley torture her for using words like “stunned” in the next mission. The satanic events supervised by Claudia Winkman continue on Thursday. Holly Richardson

Repair shop

8pm, BBC One
Four family treasures arrive at the shed to be repaired: John’s model of the century-old (and formerly working) coal mine, built by his miner grandfather; Sarah and Laura’s tattered Victorian writing box; 75-year-old Rosebud Jackie (a much-loved doll, not a skater); and a rare but stained 1930s Tilly drawing of Humber Bridge. Can new legs and a wig be found for Rosebud at least? Ali Catterall

Portrait Artist of 2025

8 p.m., Sky Arts

Broadcaster James May, actor Billy Porter and presenter Emma Barnett will have a tear-jerking and nerve-wracking time as they pose for their portraits in this fantastic competition. The business judges are Tai-Shan Scherenberg, Kathleen Soriano and Kate Bryan. Human resources

Grand designs

9pm on Channel 4
The One Planet development planning laws are unique to Wales, allowing rural housing that achieves a low environmental footprint. Marcus and Abby have just received permission to build in Pembrokeshire, where they have £100,000 to build an off-grid family home. Kevin McCloud checks in for their flight. Human resources

document

9pm, Sky Witness
This drama about an amnesiac doctor trying to piece together eight lost years continues its intriguing trajectory. This time a woman collapses at the altar on her wedding day. Stress or cold marital feet? Meanwhile, in flashback news, Amy, played by Molly Parker, meets another colleague who holds a grudge against her. Was she really that terrible before the accident? Phil Harrison

The most expensive houses in Britain

At 10pm on Channel 4
This old-money answer to Netflix’s Selling Sunset swagger makes up for what it lacks in swimming pools. In this episode, there are sea views too, as broker Josh looks to find something for Rob in the £15 million range with direct access to the beach. Meanwhile, in County Durham, Lord and Lady Gray are looking to downsize from the country pile. Ellen E. Jones