Mandy

10pm, BBC Two
Hurrah for the return of Diane Morgan’s gormless heroine in this fourth series. Mandy – quite believably – still hasn’t got a job, so in the first of this week’s double-bill, she needs to enrol on the Restart scheme. Cue a Pretty Woman style makeover, a run-in with an old school bully (“I’ve got mental health cos of you!”) and a Martin Lewis cameo. Sian Gibson and Cheryl Fergison (Heather from EastEnders) also guest star. Hollie Richardson

Michael Mosley: Secrets of the Superagers

8pm, Channel 4
In Okinawa, Japan, they’re living much longer: it’s home to more centenarians than anywhere else on the globe. Filmed before he died, Michael Mosley uncovers a possible explanation. On the Faroe Islands, he joins a women’s football team studying bone density, then in Halifax he meets an 84-year-old ballerina who reveals what’s really behind muscle strength. Ali Catterall

Human

9pm, BBC Two
Ella Al-Shamahi’s mind-blowing evolution series continues, and she’s showing us how we became the only global species of human – including being the first to make the crossing to Australia about 45,000 years ago. She also learns more about Homo floresiensis, fondly referred to as Hobbits. HR

Shark! Celebrity Infested Waters

9pm, ITV1

It’s 50 years since Jaws – and ITV claims to be on a mission to celebrate the magnificence of a much-maligned marine species, by encouraging celebrities to swim with 900kg tiger sharks. This episode may have you questioning if there isn’t something else going on: because some of these celebrities are quite annoying, aren’t they? Ellen E Jones

The Couple Next Door

9pm, Channel 4
We’re halfway through the steamy thriller and it’s the morning after the threesome before. Charlotte (Annabel Scholey) wants to forget about it, Jacob (Sam Palladio) is clearly chuffed about it happening, and Mia (Aggy K Adams) is distracted by learning that her photo is in the local paper. Who is she scared of finding her? More flashbacks give clues. HR

Secrets of the Hells Angels

11.05pm, Channel 4
A new documentary series gets inside the world of the notorious biker club, with first-hand accounts of the gang’s criminal activities. The double-bill fires up by talking with ATF agent Jay Dobyns, who went undercover as an Angel, and biker Jay, who dreams of becoming “fully patched”. HR