Travel Man: 48 Hours in Porto, C4, 8.30pm

RICHARD Ayoade is joined by comedian Nish Kumar for a short break in Portugal’s second city, starting their trip with a welcome tipple of its eponymous fortified wine. To get their bearings, they hire electric scooters and refuel with Porto’s favourite sandwich, the meaty francesinha, before having a 5D cinema experience and climbing the Arrabida bridge.

Mark Kermode’s Secrets of Cinema, BBC4, 9pm
MARK Kermode grew up in the 1970s, the heyday of the all-star Hollywood disaster movie, and he’s always been fascinated by the genre, which continues to thrive today. Here, the critic shows how disaster movies use stunts and sound, editing and special effects to bring us jaw-dropping visions of earthquakes, explosions and eruptions, and how film-makers rely on recurring story devices, themes and characters to maintain our sense of jeopardy. Mark also showcases the remarkable range of disaster movies, from claustrophobic solo survival stories, to films that explore the ultimate catastrophe – the end of the world.

Not Going Out, BBC1, 9pm
IT may not get the hype of some other sitcoms – its return last week didn’t get nearly as much media attention as two other recent Monday night comedies, This Time with Alan Partridge and the critically adored Fleabag – but Not Going Out has quietly become the longest-running British sitcom currently on air. The 10th series continues as Lee is shocked to learn that the twins have started sex education at school.

The Widow, STV, 9pm
AS she finally comes face to face with Pieter, Georgia resorts to extreme measures to learn more about Will’s disappearance. Judith’s return to her home brings back memories from her past, but she doesn’t foresee an unexpected twist of fate. Drama by Harry and Jack Williams about a woman who travels to Kinshasa in DR Congo to uncover the truth about the death of her husband three years previously.