FRIDAY

UNREPORTED WORLD

7.30PM, CH4 HHH Billions of locusts are swarming across Kenya and neighbouring countries, destroying crops and devastating economies. Reporter Sahar Zand travelled there to investigate a plague that threatens millions with starvation.

GARDENERS’ WORLD

8PM, BBC2 HHHH Monty Don looks ahead to next spring when he plants early-flowering wild flowers at Longmeadow, while Nick Bailey continues to explore the South African origins of our favourite summer bulbs.

TRAVEL MAN’S GREATEST TRIPS

8PM, CH4 HHH

The last of this highlights series has the theme of mind, body and soul. Look out for Richard Ayoade trying out beach yoga in Miami with Rhod Gilbert, learning Hungarian in Budapest with Aisling Bea, and searching for the Holy Grail in Valencia with Sara Pascoe.

SECRETS OF THE LUXURY SUPER YACHTS

8PM, CH5 HHH

This new, one-off documentary explores the secret world of £100 million luxury vessels, from a shipyard in Tuscany to a sales show in Barcelona and brokers in Monaco – and also meets former crew members who reveal how the super-rich really behave on board.