The Great Climate Fight
9.15pm, Channel 4
Net zero by 2025 can be achieved, claims this scathing two-part documentary; the only thing preventing the UK’s part in this is the government – but why? “They are completely and utterly gaslighting us,” says a furious Mary Portas, who has teamed up with Hugh Fearnley-Whittingstall and Kevin McCloud to prove that greener is now cheaper, study how other countries are doing it, and put it all to ministers – which involves sending Rishi Sunak a book by Jilly Cooper. Hollie Richardson
Secrets of the Aquarium
8pm, BBC Two
It’s another day at the aquarium in this lovely series, and we are introduced to the sea cucumber that breathes through his bottom, cow nose rays that won’t stop breeding and need a contraceptive and Friday the naughty sea turtle who continues to get into trouble. HR
The Great British Bake Off
8pm, Channel 4
Four bakers are left: the patisserie week semi-final will root out which of them is least adept at producing flaky, buttery treats. There are French classics to bake in the signature and technical rounds, followed by Italian-inspired showstoppers made up of layers of puff pastry. With belts loosened, Paul Hollywood and Prue Leith are ready to judge. Jack Seale
Louis Theroux Interviews
9pm, BBC Two
One minute Joan Collins is showing Louis Theroux her “wall of shame”, showcasing her 2,000 magazine covers. Next, they are in a room full of photos of the Hollywood icon’s friends – most of whom, she points out, have since died, including her sister Jackie. It sets the tone for a rich, scandalous and sometimes bittersweet interview with the 90-year-old. HR
The Australian Wars
9.05pm, BBC Four
The final part of this documentary on the nation-defining frontier conflicts delves into the difficult history of the Native Police, who from 1837 killed approximately 72,000 Indigenous Australians on behalf of the white settlers. Then, in an emotional sequence in Arrernte lands, film-maker Rachel Perkins brings her own family story full circle. Ellen E Jones
Live at the Apollo
9.45pm, BBC Two
Lou Sanders hosts this week’s instalment of standup. She’s joined by Parisian comic Celya AB for skits on football, supermarkets and working in a British office (“wall-to-wall people talking about lunch all day”). Plus, Neil Delamere, whose bluff observational gags include his homeland of Ireland’s obesity epidemic: “Only 180 years after the worst famine in western Europe? I call that a comeback!” Alexi Duggins
Film choice
The Tingler (William Castle, 1959), 11pm, Talking Pictures TV
B-movie producer William Castle was a master of the gimmick. Mr Sardonicus, which follows later, ends with Castle popping up to let the audience vote between two endings (the happy one was allegedly never shot). This horror – about a creature that appears on your spine when you’re afraid – featured, in some cinemas, electric buzzers on seats that gave a shock when the thing appeared. Vincent Price is the calm centre of a deeply silly film as the scientist who finds out that only screaming can stop the Tingler – not such good news for the deaf woman he meets. Simon Wardell
