Sherlock
9pm, BBC1
Following last week’s shocking familial revelations – not to mention the brilliantly grotesque turn from Toby Jones as the “dangerous and despicable” Culverton Smith – the reunited Sherlock and Watson wind up series four with a most daunting challenge, when a threat that they believed to have been long consigned to the past makes a worrisome return. As far as dastardly criminal long games go, this one looks to take some beating. Ben Arnold
John Berger: The Art of Looking
11.30pm, BBC4
This superb film was first broadcast in November, on the occasion of Berger’s 90th birthday, and is being repeated by way of mourning the fact that it proved to be the art critic’s last. The film hinges on Berger’s delight on being able to see properly again, following surgery to remove cataracts; for someone who gave so much thought to what we absorb through our eyes, it was an opportunity to be astonished all over again. Andrew Mueller
Call The Midwife: The Casebook
5.05pm, BBC1
In a series curtain raiser, the very actorly Stephen McGann, AKA Dr Patrick Turner, goes in search of the “real stories behind Call The Midwife”. As we see photographs of shocking deprivation taken in Liverpool, it’s a stark reminder of how the Britain of the 1950s and 60s was a completely different world. There are lighthearted moments too, though. Midwife Eleanor Stewart on how trainees would huddle around beds to view births: “Can you all see, girls?” Jonathan Wright
Endeavour
8pm, ITV
Another outing for the enjoyable Young Morse drama, now in 1967. Tonight, the independent arrival in Oxford of decency campaigner Joy Pettybon and a rock group, the Wildwood, coincides with the death of a young bricklayer’s mate. Great stuff from Roger Allam and Shaun Evans as the show blends 60s and 70s themes with stylish spirit. Good luck to the (fictional) Wildwood for their US tour with the Kinks; in real life the Kinks would be banned there until 1969. John Robinson
Thailand: Earth’s Tropical Paradise
9pm, BBC2
Last trip to sample the wildlife in the south-east Asian kingdom. Tonight we visit northern Thailand, where whitewater streams bleed through vast mountainous woodland, offering shelter to some of nature’s rarest creatures. As viewers of Planet Earth II will know, racer snakes are a formidable threat to any potential prey. Their presence in subterranean caverns offers one example of how challenging life is for the region’s wildlife. Mark Gibbings-Jones
Sea of Hope: America’s Underwater Treasure
7pm, Nat Geo Wild
A tour of the oceans in the company of conservationist Sylvia Earle, whose efforts to safeguard marine biodiversity become more urgent with every passing year. Earle campaigns for US waters to include areas protected from overfishing. As she puts pressure on presidents – Barack Obama is persuaded to visit Hawaii and expand the reserve there – and educates kids, sparkling underwater photography illustrates what’s at stake. Jack Seale
Freddie Down Under
8pm, Sky1
Early on in this new series, the voiceover admits that the premise is “paper-thin”. And this pre-emptive mea culpa is borne out in spades. The idea is that cricketer-turned-banter merchant Andrew Flintoff will reprise his mobile chippy project, only in Oz, offering barbecued meat. But not much meat is cooked in this opener; instead, Flintoff joshes with travelling companion Rob Penn, tries cattle mustering and generally behaves like the bluff overgrown schoolboy he is. Phil Harrison
Film choice
The Hobbit: An Unexpected Journey
(Peter Jackson, 2012) Sunday, 6.45pm, ITV2
Peter Jackson’s companion piece to the epicest-of-epics The Lord of the Rings gives Tolkien’s smaller, lighter novel a similarly majestic treatment. This first part of the trilogy launches another heroic quest, with good wizard Gandalf (Ian McKellen) sending Martin Freeman’s modestly heroic hobbit Bilbo and a band of bad-tempered dwarves (led by Richard Armitage’s mighty but miserable Thorin) to recover the lost kingdom of Erebor, which is now ruled by Smaug the dragon. And of course, the ‘orrible Orcs are back… Paul Howlett
Get Carter
(Mike Hodges, 1971), 10.05pm, TCM
Still the guvnor of British gangster films, Michael Caine’s impassive, amoral Jack Carter – a very ’eavy London ’ood who goes up to Newcastle to sort out his brother’s killers – is now raised to the status of screen icon. The dour locations are matched by the hard faces – John Osborne, Ian Hendry, George Sewell – in a stark, seminal thriller. Paul Howlett
Poetry
(Lee Chang-dong, 2010), 1.10am, Film4
There’s a poetic sensibility to Korean director Lee Chang-dong’s quietly enchanting drama. It centres on a luminous performance by Yoon Jeong-hie as Mi-ja, a grandmother looking after her troubled grandson. But two discoveries fracture her life: a diagnosis of Alzheimer’s and the appearance of a teenage girl’s body in the river, with whom Mi-ja has a tragic connection. Paul Howlett
8½
(Federico Fellini, 1963), 1.15am, Sky Arts
As a director inclined to share his life with his audience, this is Fellini’s most explicitly autobiographical work. His favourite leading man, Marcello Mastroianni, plays an anguished director “trying to pull together the pieces of his life and make sense of them,” as Fellini once explained. It’s an exotic meld of fact and fantasy that won Fellini a best foreign film Oscar. Paul Howlett
Today’s best live sport
ODI Cricket: India v England 7.30am, Sky Sports 2 First of three one-day matches.
Snooker: The Masters, 1pm, BBC2 Six-time winner Ronnie O’Sullivan takes on Liang Wenbo in the opening last-16 match.
Darts: BDO World Championships, 4pm, BT Sport 1; 4.15pm, Channel 4 The men’s final, from the Lakeside Country Club.
Australian Open Tennis 12midnight, Eurosport 1 Opening day coverage.