Tonight’s new Frontline, in its first segment called Isis in Afghanistan, takes an in-depth look at terrorism – but not in France. The first and primary report, by Afghan reporter Najibullah Quraishi, looks at how ISIS is recruiting a new, frighteningly young generation of jihadists in Afghanistan. The show’s second story, by reporter Mobeen Azhar, looks at the fight between Pakistani police and the Taliban militants in Karachi. Check local listings.