Well here's a great piece of information to get your Tuesday going! Ali Adler has confirmed throughTVLine.com that fan favorite villains from Supergirl's past will be returning. While a complete list can't be made available right now, the two notable villains Adler was able to confirm are Metallo and Livewire! Season 1 fans will remember that Brit Morgan played the supercharged villain in episode 5 (airing a week early) and in episode 18 the epic Flash and Supergirl 1st crossover!