Although the theme of the second half of Gotham is "Wrath of the Villains," it's actually known more for its resurrection of the big bads, thanks to the twisted experiments of Dr. Hugo Strange.

Not only did Strange bring Theo Galavan back from the dead, but next week he plans on bringing back season one villainess Fish Mooney, who probably isn't too thrilled about being dead in the first place.

In a promo for next week's episode, titled "A Legion of Horribles," fans get a sneak peek at Fish Mooney's return to the land of the living. And unlike Dr. Strange's other patients, she knows exactly who she is.

Here's the official description of the episode:

"Hugo Strange welcomes a familiar face to Gotham after he resurrects Fish Mooney in Indian Hill. Later, Bruce discovers a friend is in danger and teams up with Gordon, Alfred and Lucius, while uncovering more of Strange's experiments."'

So why exactly is Strange bringing back the dead? Is he just crazy or does he have a master plan for Gotham City in place? He's obviously been allowed to practice his insane experiments before, even with Thomas Wayne's knowledge, so what exactly is going on here with the mad scientist?

"He's hellbent on making this thing that's something related to science happen, and you see that all the time," BD Wong, the actor behind Dr. Strange, said to Collider. "You even see it in other science-related characters in the Batman world. It's a real common thing.

"First of all, it's fun to play a smart person who really knows what they're doing. You can't take that away from them. No matter how bad their choices are or how bad their behavior is, you can't take away from them that they're smart or that they're able to wiggle out from any number of situations that can get them in trouble."

With just two episodes to go in season two, a lot will happen before the Gotham season finale, which executive producer John Stephens teases as a must-see that will "change the nature" of Gotham City forever.

Gotham airs at 8 p.m. EDT Mondays on Fox.