This week, the science at play in an industry that dwarfs both Hollywood and the music world: computer games. We hear how video games are altering the brains of players, why lovers of the shoot-em-up could be carving out a niche for themselves in the military, and whether adrenaline-fuelled sessions on a console can be addictive. Plus, why you might need a DNA test before going on holiday in future, evidence that bees are attracted by insecticides, and how colour can affect your body clock...