After defeating the demon Mallus by cuddling him to death, the Legends join John Constantine and Ava Sharpe's Time Bureau to save their world, and their legacy, from magical creatures from myths, fairytales, and legends who have infected history. As the Legends time-travel across historical events and encounter famous figures, they now have an added shot of magical craziness.

Having spent last season trying to track down the Loom of Fate, the Legends must now save history from a foe like none they've encountered in the past or future. The timeship Waverider's crew have dealt with monsters, time anomalies, and most recently, villains from Hell, but this season they will face something even more challenging and bizarre: space aliens!

After saving the world from Vandal Savage, the Legends of Tomorrow are now charged with protecting time, past, present, and future, taking them across history and up against a threat unlike any humanity has ever known.