CHRISTOPHER STEVENS reviews last night's TV
Rating: Brain scans show that, when we tuck into a Mars bar or nibble on a square of Fruit & Nut, a specific region of our grey matter lights up with joy — our pleasure centre. Curiously, exactly the same area of our brains is stimulated when we carry out an act of calculated vengeance. 'The old saying, 'Revenge is sweet', is literally true,' remarked psychologist Steven Pinker in his two-part study The Violence Paradox (BBC4). With his greying rock-star curls and black leather jacket, Pinker looks like he'd sacrifice all the letters after his name if only he could be the lead guitarist in...