Keeping Britain Fed (BBC2, 8pm)

LOCKDOWN shifted dramatically our perception of those who keep us fed. Supermarkets were dubbed the UK’s fourth emergency service, and store staff went from mere shelf-stackers to lauded key workers. For this one-off documentary, Sara Cox and Ade Adepitan are given access to some of Britain’s biggest food retailers and their suppliers to see how their systems stood up to the most testing time in their history. Sara finds out what goes on in one supermarket, while Ade witnesses how farms, factories and depots rose to the challenge.

Cardinal: Until the Night (BBC2, 9pm)

GILES Blunt is one of the masters of Canadian crime sagas and for the past three years this TV version of his novels has made for compelling watching. We’ve already had three cracking adventures, so there’s plenty for newcomers to play catch up with, while the latest also makes for gripping viewing. In the first of this week’s double bill, Josh’s dad is still in danger, and Lise must try to save him. As the killer’s motives become clearer, Cardinal and Delorme travel to Toronto to search his abandoned flat.

The Great British Sewing Bee (BBC1, 9pm)

THE four remaining contestants take part in the semi-final, creating garments and techniques from the silver screen. First, the semi-finalists must follow a pattern like none they have encountered before, as judges Patrick Grant and Esme Young ask them to make a dress inspired by Marilyn Monroe’s in The Seven Year Itch. In the Transformation Challenge, the sewers have to make a sci-fi inspired outfit in just 90 minutes, before creating a made-to-measure flapper dress for the final task.

George Clarke’s Amazing Spaces (C4, 9pm)

NEW series. Architect George Clarke delves into the world of small builds, meeting people taking tiny, unpromising spaces and creating places to live, work and play. In the first episode of a new series, George meets a couple who are creating a disappearing bathroom and a man squeezing a camper into a Reliant Robin. He also discovers Chile’s stunning architecture, and plans his hardest-ever build, an observatory.