Thursday, 8pm, ABC1 This episode of the ABC’s flagship science program attempts to answer the question: ‘‘ Do we face a future where we will be increasingly brain doping?’’ Only three out of five for grammar, but five out of five for this investigation into drugs in sport and life. First up, Maryanne Demasi looks into peptides, the main villains in the recent Australian drugs in sport scandal. If your sport is about power and strength, then one of the most commonly used peptides is human growth hormone. Gym junkies would be well advised to listen up. ‘‘ Giving the body more growth hormone than it needs does not make you stronger or more powerful,’’ says endocrinologist Ken Ho. Though muscles will look bigger, most of that is accounted for by fluid retention. The focus of the episode is really on how drug cheats and those who would detect them are in an endless race against each other. But there’s plenty of surprisingly useful information about drug misuse along the way.