Watch this

Beautiful Minds 9pm, BBC4 The second programme on great British scientists features James Lovelock, the maverick who came up with the Gaia theory and the idea that the world is a self-regulating system that we mess with at our peril. The mildly dyslexic scientist makes a case for independent research – for much of his life he has worked out of a shed in the garden, and he discovered CFCs in the atmosphere by using his family as assistants – and he works for the sake of curiosity and interest, rather than money. He is the type of scientist who challenges orthodoxy and how science is conventionally done, yet appears the most mild-mannered and amiable person you're likely to meet. Jamie Does . . . Marrakech 9pm, Channel 4 Having tired us all out with his ceaselessly chirpy series At Home and done a decent job of calling everyone "brother" in the States, the patron saint of corblimey cooking heads off on an adventure worthy of 1,000 gap years. He's off to six different cities to sample the food and culture, starting in Marrakech, one of the world's most fascinating and sensory food hubs. Oliver's style might be a matter of taste, but it's hard to be bored by such wide-eyed, genuine enthusiasm. Mad Men 10pm, BBC4 After the drama of JFK last week, can Matt Weiner and the Mad Men team top it to end the series? There's always a way. Once Connie Hilton drops Don a hint that his employer's parent company is about to be sold, Draper goes into action stations as he tries to engineer a divorce from Sterling Cooper before it's too late. Speaking of divorce, someone else wants one too. A corking end to series three of the best show on TV. Follow our series-one catch up blog at theguardian.com/tv from next Monday. Human Target 10pm, Syfy Mark Valley (The 4400) stars in this new lightweight action series about a bodyguard, Christopher Chance, who gets hired to help with the sort of cases where you just can't call the police, but still need someone to do some tough-guy undercover work. It's very much a throwback to the in-and-out TV of the 1980s – no time for over-arching mythology here. Jackie Earle Haley (creepy vigilante Rorschach in Watchmen) is his hacker buddy. First up, he's assigned to protect the designer of a new ultra high-speed train in California.