Broadchurch
9pm, ITV
Chris Chibnall’s final series of Broadchurch reaches its denouement, and the unmasking of Trish Winterman’s attacker. Thanks to last week’s revelations, there’s a heck of a lot to wrap up – from the creepy drawer in Clive Lucas’s lock-up, to the mysterious football sock, to Ian Winterman’s dodgy spyware, to Jim Atwood’s aggressive philandering. With each of the excessive number of suspects looking shiftier than ever before, Miller and Hardy have their work cut out. Ben Arnold
Nature’s Weirdest Events
8pm, BBC2
More pages from Chris Packham’s casebook of curious creatures. While those of us lacking pre-prepared beach bodies might sympathise, the arrival of a shapeless grey blob on a Mexican beach baffles locals and the internet alike – how did the luckless beast arrive there? Elsewhere, is a gorilla really responsible for an upswing in female visitors at Kyoto municipal zoo? And can an octopus really tickle prey into submission? Mark Gibbings-Jones
Hunting the KGB Killers
9pm, Channel 4
Russian agent Alexander Litvinenko might have chosen the wrong man – one Vladimir Putin – to talk to about his suspicions of corruption in the secret services. From that moment, his card may have been marked. Like a real-life Le Carré, this terrifying documentary featuring contributions from Litvinenko’s widow Marina tells the story of his poisoning, and of that strangest of things – a man attempting to solve his own murder. Ali Catterall
Warship
8pm, Channel 4
Second episode of this absorbing series, following the Royal Navy’s fleet flagship HMS Ocean as it undertakes a deployment to the Mediterranean and beyond. Tonight’s instalment sees the helicopter carrier undertaking both sides of modern military forays: on high alert off the Red Sea coast of Yemen, where both American and Saudi vessels have recently been targeted by Houthi rebels; and projecting soft power in Alexandria, hosting a cocktail party for Egyptian officers. Andrew Mueller
Amazing Hotels: Life Beyond the Lobby
9pm, BBC2
Monica Galetti and Giles Coren are your odd couple on this trip behind the scenes at some of the world’s most exclusive hotels. The Royal Mansour in Marrakech has, as one American guest puts it, a lot of “gran-dooer”. It also has strict staff protocols and a mile-long network of subterranean service corridors, too. Monica and Giles, meanwhile, spend some moderately cheeky time learning how to uphold the hotel’s exacting standards. John Robinson
Inside the Freemasons
8pm, Sky1
The extreme secretiveness of the Freemasons has led to suspicions that they are engaged in all kinds of far-reaching conspiracies. In this series, they partially lift the lid on their activities to assuage such fears. You soon suspect that all of the solemn ritual represents a front for middle managers and salesmen to give each other a commercial leg-up and have a few drinks away from the womenfolk. Tonight, a genial young farmer is prepared for his initiation as a mason. David Stubbs
Micky Flanagan Thinking Aloud
9pm, Sky1
During a hiatus from the biz, the cockney comic began looking at, in his words, “the big issues”, and a new, sub-Karl Pilkington venture was born. In this first episode, Micky grapples with what gender means today through a series of tenuously linked encounters with, among others, the owner of a men-only barber’s, a female wrestler and a transgender woman. The result prioritises weirdness over insight – and proper laughs. Hannah J Davies
Film choice
Guardians of the Galaxy (James Gunn, 2014) 8.30pm, BBC1
Marvel’s interstellar gang of space crims surf the thin divide between superheroic and plain ridiculous. Chris Pratt is adventurer Quill, who gathers a ragtag crew – bark-covered Groot (Vin Diesel), slinky Gamora (Zoe Saldana), bag-of-muscles Drax (Dave Bautista) and Rocket, the missile-packing raccoon (Bradley Cooper) – to keep a mysteriously powerful orb (think LoTR’s one ring) out of the hammer-wielding hands of evil Ronan; and what anarchic, explosive fun they have doing it. Paul Howlett
The Boy in the Striped Pyjamas (Mark Herman, 2008) 10pm, BBC2
Two boys sit on opposite sides of a barbed-wire fence: Nazi commandant’s son Bruno (Asa Butterfield) on the outside and a Jewish boy in striped pyjamas, Shmuel (Jack Scanlon), on the inside. Their innocent friendship is a powerful counterpoint to the evil of the Holocaust, in an affecting adaptation of John Boyne’s novel. PH
Live sport
Snooker: The World Championship 10am, BBC2. More first-round action from the Crucible in Sheffield.
Championship Football: Fulham v Aston Villa 2.30pm, Sky Sports 1. First of two Championship games, with Derby County v Huddersfield Town to follow.
Super League Rugby: Wakefield Trinity v Wigan Warriors 2.30pm, Sky Sports 2. Roses clash at the Beaumont Legal Stadium.
