Pop culture is important to DC's Legends of Tomorrow. The daffy superhero dramedy shape-shifts on a weekly basis as each episode inhabits different genres (from pirates to a zombie apocalypse) and parodies and homages various movies and TV shows. That passion also seeps into the show's characters, several of whom wouldn't have found a place on the Waverider were it not for the media they consumed. For example, in season 2, we learned that George Lucas' Star Wars and Indiana Jones movies were integral to Nate (Nick Zano) and Ray Palmer (Brandon Routh) becoming superheroes. This Sunday, the CW series returns to that well with "This Is Gus," an episode that finally digs into Behrad's (Shayan Sobhian) backstory and explores how an under-appreciated stoner sitcom helped him become the chill, stoner hero he is today.