With history left unguarded since the destruction of the Time Masters, a new group of villains has stepped in to alter the past for their own interests. Now, the Legends are history's only hope and they must fight to protect the timeline from a mysterious new threat. The mission gets complicated when a historian, Dr. Nate Heywood (Nick Zano), discovers that the Legends have been separated throughout time and must find a way to rescue them. Season 2 of this superhero action-adventure drama introduces new heroes and villains and features a special crossover episode with "The Flash," "Arrow," and "Supergirl." Joining the cast are Matt Letscher, Neal McDonough, and Patrick J. Adams.