Before catastrophic events like 9/11 and COVID led to travel restrictions and beefed up security, the most noted dangers to globetrotting came from individuals  like Charles Sobhraj, portrayed by Tahar Rahim in The Serpent. A psychopath with complete disregard for human life and no fear of killing, Sobhraj is one of the most infamous international serial killers of the 1970s. This series does its best not to glorify this heinous individual, by highlighting the courageous investigation Herman Knippenberg and his wife Angela put together to stop Sobhraj, however true crime junkies are sure to get their moneys worth.