The Prosecutors, BBC2, 9pm
DRUGS are big business in prisons. On the inside they can fetch four times their street value, and serving time can become a business opportunity for kingpin convicts. To prosecute the offenders, police need evidence of who’s involved on the inside – and who’s flying the packages in. Filmed over a year, with behind-the-scenes access to the CPS and West Mercia police, this two-part film follows Senior Crown Prosecutor Eran Cutliffe as she works to build a complex case against a network of people, who use drones to exploit the captive market.

Our Shirley Valentine Summer, STV, 9pm

THE celebrity women continue their journey of self-discovery on the Greek island of Naxos – and the search for love continues as Lizzie Cundy is invited on a second date with neighbour Yannis, while Aggie MacKenzie signs up to a dating app. Sian Lloyd takes time to reflect on the night her husband left and Ninia Benjamin is determined to get fit, finding all the inspiration she needs in the form of a hunky personal trainer. Lizzie also takes a road trip to Crete in search of her childhood sweetheart.

Meet the Drug Lords: Inside the Real Narcos, C4, 9pm
NEW series. Former Special Forces soldier Jason Fox travels through South America, investigating the cartel strongholds of Mexico, Colombia and Peru to lift the lid on their brutal worlds. What kind of lives do their members have, what does their work involve and how do they continue to evade the law? Jason begins in Mexico, where he meets members of the Sinaloa cartel – including killers and ex-assassins – witnesses brutality first hand and finds himself in the middle of a turf war.

Evil Monkeys, ITV2, 9pm
WHAT do you get when you cross Planet of the Apes with The Island of Dr Moreau and create a comedy reality game show? After landing on the remote island by boat, three celebrities are tempted inside and trapped in their own Human Zoo by the apes. They face a series of games, featuring the apes as antagonists and designed to ensure maximum slapstick comedy. The quicker the celebs complete each game the more time they get in the final test – a giant assault course involving blind driving, swinging ape pendulums and a climbing tower.