999: The Critical List

9pm, Channel 4
Theatre 6 is the only operating room in Royal Blackburn hospital that is dedicated to unplanned emergency procedures – but who decides which life-or-death cases that come through the A&E door make it in there? This pressing new series shows us, starting with a young boy who is hours away from losing a testicle, a man with a suspected burst colon, and a patient who has self-inflicted injuries from needles in his neck. Hollie Richardson

Chess Masters: The Endgame

8pm, BBC Two
It’s the semifinal nail-biter. The top six contenders square off across the board in War & Pieces, a challenge specially designed by grandmaster David Howell. For the three losing players, extra humiliation awaits: a simultaneous match against the terrifying nine-year-old prodigy Bodhana Sivanandan, the youngest chess player ever to represent England internationally. Ali Catterall

Secrets of Supermarket Buyers

8pm, Channel 4

Denise van Outen is back in the produce aisle, snooping in shopping trolleys and chatting at the cashiers’ desk, all in the hope of uncovering the truth about supermarkets. In this episode, she’s at everyone’s favourite “discount disruptors” Lidl and Aldi, looking into how customer loyalty is won and what makes a special offer truly special. Ellen E Jones

University Challenge

8.30pm, BBC Two
BBC Two’s Monday night brain Olympics is becoming unbearably tense and exciting, with all three of its intellectual contests nearing their grand finales. Now the grande dame of them all ratchets up the drama yet again: it’s the first of this year’s UC semi-finals. Jack Seale

The Feud

9pm, Channel 5
This drama about neighbours at war has felt like a turbocharged soap, complete with screaming matches, adulterous flings and a steadily rising number of bricks being chucked through windows. At least all the cast – led by Jill Halfpenny – seem to be relishing the non-stop strop-fest. Graeme Virtue

The Last of Us

9pm, Sky Atlantic
Ellie (Bella Ramsey) and Joel’s (Pedro Pascal) fraught relationship may be causing the most drama so far in the second series of the mushroom infected-fest, but last week’s cliffhanger promised more layers of danger ahead – chiefly with an evolved monster on the loose and angry Firefly Abby (Kaitlyn Dever) out for revenge. HR

Film choice

Accident (Joseph Losey, 1967) 9.05pm, Talking Pictures TV
The second of three collaborations between gimlet-eyed writer Harold Pinter and expat US director Joseph Losey is a calculated study in toxic masculinity. Dirk Bogarde is superb as self-absorbed married Oxford don Stephen. After a car crash kills his favoured student William (Michael York), flashbacks about their relationship and William’s girlfriend Anna (Jacqueline Sassard) unfurl a story of entitlement, temptation and near-sociopathy in his insular academic world. Simon Wardell

Live sport

Premier League football: Tottenham v Nottingham Forest 7.30pm, Sky Sports Main Event. Manchester City v Aston Villa is on Tuesday at 7pm; Arsenal v Crystal Palace is on Wednesday at 7.30pm.