World Athletics Championships
6.30pm, BBC1
It’s the penultimate night of this year’s championships, with Gabby Logan hosting from the London Stadium. There’s the conclusion of the decathlon with some javelin and 1500m action in store, as well as the finals of the women’s high jump and 100m hurdles. But the main events will, of course, be the final competitive track appearances from Usain Bolt in the 4x100m relay finals and the magnificent Mo Farah in the 5,000m. Ben Arnold
Paul O’Grady’s Hollywood
8pm, Channel 4
Paul O’Grady’s presentational style is more cosy chat than Cahiers du Cinéma, but this is an agreeable enough breeze through aspects of Tinseltown’s history. This week, Jonathan Ross, Maureen Lipman and Celine Dion all contribute as O’Grady looks at musical numbers in film, taking in everything from Tommy to Mary Poppins and The Rocky Horror Picture Show. And then there’s Disney, keeping the genre alive in the 21st century. Concludes tomorrow evening on More4. David Stubbs
I Know Who You Are
9pm, BBC4
Grab a pen, some pins and a ball of string as the impressive Spanish thriller tells us exactly who abducted Ana. The revealed labyrinth of secrets is a knotty one, with plenty of extra surprises after we get the answer … and then a whopping great cliffhanger, because there are actually six more episodes to be aired later this year. This is easily as exciting as a real season finale, though, with Francesc Garrido still magnetic as vulpine chief suspect Elías. Jack Seale
Performance Live: Flood – To the Sea
10pm, BBC2
The third part of James Phillips’s multimedia epic, Flood, staged at Victoria Dock in Hull as part of its stint as the 2017 City of Culture. It’s a reimagining of one of the oldest stories in mythology: that of the cleansing/destroying flood washing away the world. Phillips’s telling demonstrates a dual modern-day relevance, alluding both to the possible effects of climate change and the issue of refugees fleeing one variety of disaster or another. Andrew Mueller
Celebrity Big Brother
10.30pm, Channel 5
It’s the most wonderful time of the week for people who like to watch celebs screeching and fighting over “butt washcloths”, as Trisha Paytas did last week. Tonight sees the (semi-) famous hordes react to the most recent eviction, and there’s a recap of the past 24 hours. After a sub-standard civilian BB, it’s a treat to see this motley crew kicking off in the most entertaining way, as well as playing those fame-based games. Hannah Verdier
Superheroes Decoded
9pm, History
This pleasingly thoughtful series traces the origins of the modern breed of musclebound, Lycra-clad saviours through the prism of 20th-century American history and self-image. Tonight it explores Superman’s roots in the Great Depression, Captain America and Wonder Woman striding hand-in-hand from the rubble of the second world war, and Batman’s dark reflection of personal loss and urban dysfunction. Phil Harrison
An Elephant’s World
7pm, Nat Geo Wild
Elephants, like characters in EastEnders, are all about faaaaamily. That’s what you’ll learn in this one-off doc to mark World Elephant Day. It follows elephants in Kenya, India and Mali as they face famine, poachers and predators, showing an impressive sense of fellowship through it all. So, if the narrator sometimes gets a bit carried away (“Mammoth silhouettes shimmer like mirages”), you can hardly blame him. Ellen E Jones
Film choice
The Philadelphia Story (George Cukor, 1940) 2.20pm, BBC2
This coruscating romantic comedy is the epitome of old Hollywood style. Katharine Hepburn is idle-rich Tracy Lord who sees sense on the eve of her second wedding. After getting drunk with James Stewart’s red top-style hack she goes back to first husband, wry Dexter (Cary Grant). Effortless wit. Paul Howlett
Wake In Fright (Ted Kotcheff, 1971) Saturday, 1am, Film4
A lost classic of the Australian new wave, Canadian director Kotcheff’s drama has become notorious for its real-life kangaroo-hunting scene but is most impressive for its relentless, sweat-stained focus on outback teacher Gary Bond’s long, dark weekend of the soul. En route to Sydney (and “civilisation”) the self-centred loner gets waylaid in a dusty mining town after losing all his money gambling. Extended bouts of ferocious drinking, fighting and general larrikin behaviour ensue, and nobody comes out it looking particularly good. Simon Wardell
Little Women (Mervyn LeRoy, 1949) 8am, BBC2
The middle of three big-screen versions of Louisa May Alcott’s classic novel. The MGM production values are impeccable, it’s shot in handsome Technicolor and the cast includes June Allyson, Margaret O’Brien, Elizabeth Taylor and Janet Leigh – but still it seems lacklustre compared to George Cukor’s 1933 scintillating original and Gillian Armstrong’s spirited 1994 account. PH
Buried (Rodrigo Cortés, 2010) 12midnight, BBC1
Set inside a coffin, this unusual and ingenious thriller pretty much corners the market in claustrophobia. Ryan Reynolds is an American contractor in Iraq who awakes buried alive with only a mobile, a lighter and a light-stick for company. Inevitably, time hangs heavy here and there, but Rodrigo Cortés is highly inventive in teasing out the sweaty terror. PH
Today’s live sport
Premier League Football: Watford v Liverpool 11.30am, Sky Sports Main Event
Coverage of both teams’ opening match of the top-flight campaign.
ATP Masters Tennis 4.25pm, Sky Sports Action
Day six, featuring the opening semi-final.
Premier League Football: Brighton v Manchester City 5pm, BT Sport 1
Live from the Amex Stadium, the Seagulls play their first game in the top division since 1983.
