Thinking, inside the box BBC Four aims to touch parts of the brain other channels do not reach. Matthew Reisz speaks to Richard Klein, its controller, who says that academics, together with their passions, have key roles to play in the channel's programming By Matthew Reisz 7 October
Mac the knife Duncan Wu's inner adolescent rejoices in a crazy tale of an armed pensioner's battle with injustice 7 October
Daytime TV: Creative impulses Gauguin and Vaughan Williams had unconventional private lives, but they created beauty, says Gary Day 7 October