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

TL;DR
- Monty Don bids farewell to Gardeners' World after more than 20 years.
- Return to Paradise season three begins with a murder at an art fair.
- Unreported World investigates contract killers silencing whistleblowers in South Africa.
- The Walking Dead: Dead City season three finale features a showdown between Dillard and Negan.
- War, a divorce drama starring Sienna Miller and Dominic West, nears its conclusion.
- The Graham Norton Show features guests Judi Dench, Alan Cumming, Nicola Coughlan, and James Blunt.
- Film choice: Possible Love, a Korean drama exploring class and exploitation.
- Live sport: Ireland v Argentina rugby match.