PICK OF THE DAY

HORIZON: HOW TO BUILD A TIME MACHINE, 9PM, BBC2

WHEN Professor Ronald Mallett was ten years old, his beloved father died of a heart attack a at the age of 33. Soon after, Ron read The Time Machine by H.G. Wells and, ever since, he’s been o obsessed by the idea of g going back in time to warn his father of his impending death — and he now has a blueprint for a machine that could do just that, by warping space-time. Ron (pictured) is just one of the extraordinary minds featured in this mind-boggling film exploring just how close we are to turning science fiction into science fact.