In 2008, Société Générale, a major French financial institution, stunned the world with news of a 4.9 billion euro loss stemming from fraudulent activity by an employee whose identity was initially unrevealed. The four-part series "Kerviel: a trader, 50 billion," each episode lasting 45 minutes, chronicles the unfolding events and legal proceedings that arose from this incident, which has since become emblematic of f…