Although Kara woke from a dream about life on Krypton in the last episode of Supergirl, she has no time to dwell on what happened to her: on next week's episode, Kara must battle the Master Jailer, a serial killer targeting and executing escaped prisoners from Fort Rozz.

Next week also features the first appearance of Siobhan Smythe, a new employee of Cat Grant's. In DC Comics, specifically the New 52, Siobhan is an Irish immigrant who befriends Kara and eventually becomes Silver Banshee. Of course, the two don't stay friends for long, and eventually, they become enemies.

The episode will also see James Olsen and Kara argue over the Department of Extra-Normal Operations' methods of dealing with aliens and alien threats.

Last week's episode saw Maxwell Lord coming to Supergirl's aid after she fell unconscious. Does this mean that Lord is no longer a threat to Supergirl and her friends? Actor Peter Facinelli, who portrays the character, thinks that Lord's motivations don't necessarily make him good or bad.

"There's a fine line between good and evil," said Facinelli to Comic Book Resources. "He doesn't purposely do evil acts. In his mind, he does things for good. Sometimes you have to do bad things to get there. Even when you are at war, sometimes you have to sacrifice one for the greater good of many. That's where his mindset is. He's not a Lex Luthor, selfishly trying to take over the world. In his righteous mind, he's doing good."

Not only is this season of Supergirl gearing up for a crossover episode with The CW's The Flash, but former Smallville Supergirl, Laura Vandervoort, will soon arrive on the series as Indigo, a villain who causes trouble for Kara.

"She's been particularly fun to play because we didn't really have much time to discuss how they wanted Indigo to come across, so by the time I was on set in my wardrobe, I was just feeling her out in her skin, so to speak," said Vandervoort to Collider. "I just started playing and having fun with it and trying strange things that I don't normally get to try. You can get away with more when you're a villain because you're a little mentally unstable."

Supergirl airs at 8 p.m. EST Mondays on CBS.