The Truth About Getting Fit
8pm, BBC One
Dr Michael Mosley explores why we spend £600m on gym memberships we never use, while dispelling myths about how much exercise we need to do in order to get fit. Mosley may manage to do for HIIT – high-intensity interval training – what he did for the 5:2 diet. Ben Arnold
Gomorrah
9pm, Sky Atlantic
What is great about this Italian mob series is its refusal to make eye candy of the mafia. Visually, it oscillates between the ugly, sallow bleakness of the Naples suburbs in which it is set and the appallingly garish decor of the monied mobsters. No one dresses well and nothing looks good, but the characters and situation are horrifyingly gripping nonetheless. This third series opens in the wake of the slaying of Don Pietro, head of the Savastanos, and follows the ensuing power struggle. David Stubbs
Wonders of the Moon
9pm, BBC One
The moon: is it made of cheese? No. They checked. But it is still quite interesting. Using detailed imagery, this traces the monthly cycle of the moon, explores the “dark side”, ponders supermoons and gasps in wonder at a total solar eclipse. Handy, since there is a supermoon eclipse tonight. Ali Catterall
The New Builds Are Coming
9pm, BBC Two
How to mend the housing market without upsetting older property owners who can be relied upon to vote in their droves? That is the dilemma perplexing Britain’s many craven government ministers – and it is the subject of Richard Macer’s new series, which visits rural Britain’s nimby flashpoints. Phil Harrison
Kiri
9pm, Channel 4
Jack Thorne’s fraught drama about a murdered foster child concludes with tailspinning social worker Miriam (Sarah Lancashire) preparing to face her disciplinary hearing. If the chances of a happy ending seem remote, the plot threads surrounding Kiri’s disappearance are unravelled in surprising and moving ways. Graeme Virtue
Murder in Paradise
10pm, Channel 5
This new series about the demises of the rich and occasionally famous kicks off with a look at millionaire businessman Andy Bush, a jeweller from Bristol who was shot by his jealous ex-girlfriend. Very much your classic true-crime documentary: mild titillation with delusions of seriousness. John Robinson
Film choice
All Is Lost (JC Chandor, 2013), 12.50am, Film4
JC Chandor’s relentlessly gripping drama stars Robert Redford as a sailor alone on a sinking boat on the ocean. We don’t know why he is there. It is as minimalist as can be and Redford is superb, though near-silent, as the embattled wanderer struggling to overcome crushing setbacks. Utterly riveting. Paul Howlett
Live sport
Cycling: Volta a la Comunitat Valenciana The opening stage from Spain. 2pm, Eurosport 2.
Premier League football: Tottenham Hotspur v Manchester United A tasty-looking clash from Wembley Stadium. 7.15pm, BT Sport 1.
Cricket: U-19s World Cup The third-place play-off. 9.25pm, Sky Sports Cricket.
