Legends of Tomorrow: Crisis on Earth-X

"Crisis on Earth-X" is the eighth episode of season three of the superhero adventure series DC's Legends of Tomorrow, and the forty-first episode of the series overall. It was directed by Gregory Smith with a teleplay written by Phil Klemmer and Keto Shimizu based on a story treatment by Marc Guggenheim and Andrew Kreisberg. It first aired on the CW Network on Tuesday, November 28th, 2017 at 9:00 pm.