Dispatches: Coca-Cola’s Dirty Secret 8pm, Channel 4 The brand is considered socially evil in more ways than one, but Coca-Cola’s environmental impact is the specific focus of this report. Ellie Flynn – a self-confessed Coca-Cola addict – investigates the reality of what happens to the 2bn bottles of the product consumed every year in the UK, and its claims about recycled plastic and water sustainability. Hollie Richardson Tonight: Kids in Poverty – Britain’s Shame 8.30pm, ITV1 The number of children living in poverty in the UK is the highest it’s been for 20 years – more than 4 million. In this report, the journalist Paul Brand speaks to families in the thick of it and Strictly judge Shirley Ballas, who grew up in a very low-income family. HR Murder, They Hope 9pm, BBC Two Johnny Vegas and Sian Gibson revive their comedy chemistry as tour bus detectives Terry and Gemma. On the way to their wedding, they join a surprise couples therapy retreat populated by a stellar cast, which, of course, turns things into a light whodunnit. As the body count rises, only Ed Sheeran-based clues and sheer sleuthing can save them. Hannah Verdier Taskmaster 9pm, Channel 4 The knockabout comedy contest approaches the final furlongs of its 17th season, with highlights so far including Nick Mohammed’s constant Dracula cosplay and Steve Pemberton smuggling hidden messages into a Guardian cryptic crossword. This week’s crammed instalment features beatboxing and mannequin maltreatment. Graeme Virtue The Tattooist of Auschwitz 9pm, Sky Atlantic Following devastating news, Lali is forced to choose a new tattooist and befriends young prisoner Leon, in the third part of the Holocaust drama. Meanwhile, he desperately searches for Gita, risking everything to get medicine for her, including completing a horrific task for the Mengele-like Dr Schumann. And worse is to come. Ali Catterall Johnson & Knopfler’s Music Legends 10pm, Sky Arts Brian and Mark meet Chic’s Nile Rodgers this week, to get deep about the musician’s life in music. They also explore Miami’s night scene, visiting a bar where jazz trumpeter Chet Baker played, before jamming disco classic Good Times with Rodgers. HR