TV tonight: from Celia Imrie’s fart to an iconic Celebrity Traitors finale

The Celebrity Traitors Finale

9pm, BBC One
Who knew a fart would make the first celebrity version of the game such a hit? Not content with breaking wind, Celia Imrie also wailed her way into Traitors history. Then there’s Alan Carr, who went from sweating profusely to feeling zero remorse over killing his best mate Paloma Faith. The casting has been a revelation, unlike the stars’ ability to play the game – it will be a miracle if a Traitor doesn’t win. Hollie Richardson

Celebrity Race Across the World

8pm, BBC One
The popular travel show returns, with stars and their chosen companions: Anita Rani and her dad Bal, couple Tyler West and Molly Rainford, Roman Kemp and his sister Harleymoon, and – sure to be fan favourites – Dylan Llewellyn and his mum Jackie. They start in Mexico and will cross Central America to Colombia. On your marks, get set, go! HR

The Ridge

9pm, BBC Two

Suffering no fools … Lauren Lyle as Mia in The Ridge. Photograph: Great Southern Studios/Sinner Films/BBC Scotland/Sky New Zealand Originals

“This town is split in two – what side are you on?!” Lauren Lyle’s Mia is suffering no fools in the New Zealand community she believes her sister was murdered in. But digging deeper, she realises that she was even more estranged from her sibling than she expected. HR

Taskmaster

9pm, Channel 4
Thanks to the unhinged cheerfulness of Phil Ellis, the stagey fury of Maisie Adam, and the simmering frustration of Reece Shearsmith, this latest series has established its own distinctive tone. All five contestants could still win Greg Davies’s shiny head – but will that be the case after an episode whose tasks involve croissants, bricks and feather boas? Phil Harrison

RuPaul’s Drag Race UK

9pm, BBC Three
Maya Angelou and Katie Price are just some of the famous faces impersonated in Drag Race Snatch Games gone by. This week, season seven’s queens dip into their own dressing-up boxes. On judging duty are DJ Jordan North, Chewing Gum star Susan Wokoma, and everyone’s favourite Celebrity Traitor, Alan Carr. Hannah J Davies

The Iris Affair

9pm, Sky Atlantic
It’s when she’s betrayed and backed into a corner that puzzle-solving genius Iris (Niamh Algar) really comes out fighting. This episode it seems Cameron’s (Tom Hollander) trust has also been misplaced, because even among these ruthless nihilists, Hugo Pym (Harry Lloyd) takes some beating. Can anything now prevent the reactivation of “Charlie Big Potatoes”? Ellen E Jones