The Miniature Wife
9pm, Sky Atlantic
Succession meets The Borrowers? Matthew Macfadyen and Elizabeth Banks are the warring couple – one a vain scientist, the other a flailing academic – at the heart of this scabrous, sweary comedy with a sci-fi twist. The opening episode maps out the catastrophic contours of their marriage before a fateful whoopsie with a shrink ray. Graeme Virtue
Race Across the World
8pm, BBC One
This year’s travelling pairs have greater cultural shifts ahead as they journey east towards Mongolia but, for now, they’re in standard holiday-in-Europe territory. Having done Italy last week, they set off from Cephalonia and make their way through Greece. What’s the quickest way to get to Istanbul? Jack Seale
Paul Merton: Driving Amazing Trains
8pm, Channel 4
Paul Merton is funny enough company to get a pass for this inessential but likable series in which old trains are put through their paces. Paul’s dad was a tube driver, so in this opening episode it’s a thrill for him to ride “upfront” on a Northern line train – albeit one that has been retired to the Isle of Wight. Phil Harrison
Inside Barlinnie
9pm, BBC Two
This fascinating documentary series exploring life in Scotland’s largest jail returns. It’s by turns alarming, sad and tentatively redemptive as we meet JP, a drug user who overdoses in the exercise yard, and Norry, led into crime by a difficult childhood and who is threatening suicide. PH
Taskmaster
9pm, Channel 4
The group chemistry forms quickly as another bunch of comic performers (Joanna Page, Amy Gledhill, Armando Iannucci, Joel Dommett and Kumail Nanjiani) assume their positions at the foot of Greg Davies’s golden throne. There’s fun with giant statues and a solo task that looks set to annoy a single contestant for the entire season. PH
Southern belle … Jane McDonald in Nashville. Photograph: Jet Set TVJane McDonald in Nashville
9pm, Channel 5
Jane McDonald has earned the right to her own country album, having endured a hefty share of heartbreak and loss. In this new series, the singer moseys on over to Tennessee’s capital to take in the sounds and sights, and show why “this northern lass is southern, through and through”. Ali Catterall
Sport
Horse Racing: Grand National festival 1.30pm, ITV1. Day one from Aintree, including the William Hill Aintree hurdle.
Golf: The Masters 2pm, Sky Sports Main Event. Round one from Augusta, Georgia.