PICK OF THE DAY

River Monsters

8PM, ITV In 2011, the bodies of five fishermen were washed up on a beach in Mexico. Strange wounds all over the men’s bodies led to a marine biologist being called in to help with the investigation – could a vicious sea creature, dubbed ‘el diablo rojo’

(the red devil) by locals, be responsible? In episode four of this riveting series, intrepid (and perfectly named) aquatic detective Jeremy Wade (right) heads for uncharted waters to find out whether an aggressive monster (or monsters) is lurking in the murky depths of the Sea of Cortez, waiting to pounce.

Gardeners’ World

8PM, BBC2 Carol Klein, Joe Swift, Adam Frost, Rachel de Thame and the rest of the team join Monty Don at Gardeners’ World Live at the NEC for a celebration of the show’s 50th anniversary. Plus, Alan Titchmarsh and Monty reflect on lives spent in the garden, and Mary Berry reveals the winner of the golden jubilee plant award.

Count Arthur Strong

8.30PM, BBC1 This week, Arthur explains his hatred of Martin Clunes (the pair once clashed over a meat thermometer), and frets over his ‘acting’ sideline, playing the victim at murder mystery events – ‘I’m sick of being the inanimate eye candy.’ Then, an accident leads to a starring role – as a detective. It’s too much to explain, but it’s hilarious…

Versailles

9PM, BBC2 The penultimate episode of the slick period drama finds Louis XIV shocked to wake up to the realisation that he is more man than god, but will the King ever be capable of true humility? Meanwhile, Madame de Montespan resorts to desperate measures, and Philippe finds himself in deep water. There will be blood…