FAQ

Rex Tyler is a superhero called Hourman. He debuted in 1940, during the "Golden Age" of comics. Rex had developed a pill, called Miraclo, which gave him the strength and power of ten men, but only for an hour at a time. Rex had no time travel powers or technology, although a later version of Hourman, an android built by Tyler's company in the far future, did have a ship which could travel through time, as well as other time related powers.

The Justice Society of America, or JSA, is the first superhero team. Debuting in November of 1940, the team brought together several superheros which DC comics had published adventures about, including Hourman, Hawkman, the original versions of the Flash (Jay Garrick), and the Atom (who had no shrinking powers but was just a short man who was a good fighter), Green Lantern, as well as several other heroes.

It may be helpful but is not strictly necessary. While all the characters on Legends have previously appeared on Arrow or Flash, this show has a mostly new plotline. It may be helpful to watch the two part Arrow-Flash crossover "Legends of Yesterday" and "Legends of Today" since those episodes introduce the primary antagonist for Legends of Tommorow's first season.