Interior Design Masters with Alan Carr (BBC2, 8pm)

IT isn’t just a selection of rooms receiving makeovers during the new series – it’s the show itself. Fearne Cotton was the host of the first run, but this time around Alan Carr is taking charge of the proceedings. Think Joe Lycett on Sewing Bee and you get the picture. It will be Alan’s job to soothe furrowed brows and keep the contestants going as their nerves take hold, while design expert Michelle Ogundehin sets the challenges and is joined each week by a guest judge. First up is Laurence Llewelyn-Bowen, who casts an appreciative eye over the efforts of 10 wannabe professional interior designers.

Celebrity Best Home Cook (BBC1, 9pm)

HAVING friends stay over isn’t something we can do at the moment, so it perhaps seems slightly cruel for Mary Berry to set a challenge in which she wants to know what the remaining celebrities would prepare for breakfast for their guests. Chris Bavin then asks them to add an apple to his Rustle Up round challenge before Angela Hartnett takes charge of the eliminator – and there’s a surprise exit on the cards as eight celebs become seven.

Marcella (STV, 9pm)

LAST week’s opening double-bill was as exciting as anything we’ve seen so far, and proved there’s still plenty of life left in this smash-hit thriller. Anna Friel is as impressive as ever as troubled cop Marcella Backland, whose fragile grip on reality could slip altogether after she realises somebody has worked out that the identity she has adopted while trying to infiltrate the Maguire family is false. Rav also learns she’s gone undercover.

54 Days: America and the Pandemic (BBC2, 9pm)

AFTER the pomp and ceremony of his inauguration, US President Joe Biden set to work immediately, signing 15 executive orders. Many were designed to undo policies adopted by his predecessor, but the first involved boosting the federal response to Covid-19. But are his measures too little too late in a country where the virus has claimed more than 400,000 lives. The concluding part of this documentary explores the initial outbreak in the country, asking if more could have been done earlier to prevent its spread.