Season 3 continues with the Netflix documentary "The Sons of Sam: A Descent into Darkness". New York, 1977, and the city breathes a sigh of relief as the notorious serial killer Son of Sam, is finally caught. But to journalist Maury Terry, something just doesn't add up. What if the real Son of Sam is still out there? And worse still, what if there's more than one. Join host, Gemma Delaney, as she talks you through this must watch series.