The term “legend” is typically ascribed to people in admiration of their accomplishments. But for one particular group of legends—British Customs workers who networked with some of the world’s most infamous drug gangs—complete anonymity and secrecy was the difference between life and death. Now, their story is being finally shared in the aptly named Legends , a six-part series streaming on Netflix starting Thursday, May 7. Starring Steve Coogan and Tom Burke, the drama is based the real story of government workers who assumed fake identities to stop the flow of illicit drugs in the U.K. While the the achievements of these legends were hidden by design, one of the program’s key figures pulled back the curtain in a recent memoir and inspired the events of the Neil Forsyth-created series. Here’s what we know about the show and its characters.…