TV tonight: Monty Don says goodbye to Gardeners’ World after two decades

He hangs up his trowel for the final time. Plus, a divorce courtroom showdown in Sienna Miller’s glossy drama War. Here’s what to watch this evening

8pm, BBC Two After more than two decades of planting, hedging and harvesting, it’s finally time for Monty Don to hang up his trowel. Expect his final episode to have a bittersweet tone. However, gardening waits for no man: as Carol and Joe prove, from sowing to apple gathering, there’s always work to be done. PH

7.30pm, BBC One “My name is Viktor Sevchenko. I am an artist. And today, I die.” And with that, he’s stabbed through the heart in a grisly piece of performance art at Dolphin Cove art fair. But was his death a tragic accident? And why is he clutching a jelly baby? Mack (Anna Samson) investigates, kicking off an Australia-set season three double bill. Ali Catterall

7.30pm, Channel 4 An incredibly sinister story from South Africa: Darshna Soni explores the use of contract killers to silence whistleblowers, often including those making accusations of malfeasance connected to controversial government contracts. Soni speaks to a former hitman and to families who have lost loved ones. PH

9pm, Sky One As season three of the lurid zombie spin-off reaches its finale, former drinking buddies Dillard and Negan are on a collision course. Can a squirrelly dive-bar habitue really summon enough main character energy to take down one of the show’s most notorious villains? Graeme Virtue

A courtroom showdown looms as this delightfully juicy divorce drama approaches its endgame. And with Taylor and Byrne’s case looking increasingly shaky, Molly smells a rat. Is Johnny’s world about to come crashing down (again)? Dominic West and Sienna Miller are excellent, charismatic twin leads. Phil Harrison

10.40pm, BBC One Graham welcomes Judi Dench (punting a memoir), Alan Cumming (returning to the stage) and Nicola Coughlan (promoting a new drama) into his inner circle. Music, and maybe a little Celebrity Traitors gossip, comes from James Blunt. PH

Possible Love (Lee Chang-dong, 2026), Netflix

In Korean director Lee Chang-dong’s involving, edgy drama, documentary-maker Ye-ji (Cho Yeo-jeong) is attempting to make a film about factory workers sacked after a strike was violently broken by the state. She is particularly intrigued by the sullen, possibly traumatised Ho-seok (Sul Kyung-gu). He is resistant but Ye-ji develops a bond with his enthusiastic wife, Jeon Do-yeon’s Mi-ok. As the parties get to know each other, with the addition of Ye-ji’s wealthy spouse, Sang-woo (Zo In-sung), uncomfortable questions of class and exploitation swirl around them. Just as in his last film, 2018’s Burning, Chang-dong has a sharp eye for what’s hidden behind everyday lives. Simon Wardell

Nations Championship rugby: Ireland v Argentina 7.15pm, ITV1. From the Aviva Stadium, Dublin.