There's a whole evening of brand new shows ahead on Channel 4, with shoppers learning how to haggle in Britain's Secret Shoppers at 8pm before Hugh Fearnley-Whittingstall begins a three episode battle to save the seas at 9. It all culminates with this documentary about Liverpool man Mark Roberts who is knows as the most prolific streaker in the world. We'll be finding out what's motivated Mark to get his kit off so many times over the last 20 years and watching as he attempts one final streak before putting his clothes back on forever... May want to shield any sensitive eyes.