Gotham City is about fall into chaos and police are going to deal with forces they've never had to deal with before as the villains rise in "Gotham" Season 2. Fans of Batman will continue to see the origins of their favorite heroes and villains play out on screen, and the cast of the show said fans are going to be in for a real treat this season.

Ben McKenzie, who portrays Detective Jim Gordon before he becomes police commissioner of Gotham City, told International Business Times during a press event Thursday that when Season 1 was finished everyone came together to regroup and take a look at what worked and didn't work in Season 1. He said they wanted to make the show a more arranged series where you get to know the villains, feel them, and understand the complexity of the relationships they develop with the heroes and amongst other villains.

"If you remember the pilot episode it really wasn't a procedural pilot, it was what you would think would be a serialized show and we got sort of sidetracked into a procedural thing where we were introducing a villain, trying to catch that villain by the end of the episode and it really did a disservice to this sort of deep and rich history of Batman," McKenzie said. "There will never be a case of the week hopefully ever again and it will always have a serialized outline, which opens up the world to a much richer, deeper sort of relationship between all of the characters."

We will get to see the growth of several villains this season, including Selina Kyle (Camren Bicondova) ak.a. Catwoman, who will at one point develop a friendship with another iconic DC Comics villain. Unlike past portrayals, we will get to see what happens to Selina Kyle at a young age that leads to her becoming the famous Batman villain.

"Because we are the origins story, we get to have a little bit more flexibility with where we go within the storylines, which I think is brilliant," Bicondova said.

Familiar villains like Victor Zsasz (Anthony Carrigan), Oswald Cobblepot (Robin Lord Taylor), and Edward Nygma (Cory Michael Smith) will all reappear in Season 2. Fans will get a deeper look Jerome Valeska (Cameron Monaghan) this season, and many speculate he's the Joker. New villain Theo Galavan (James Frain) will also be introduced and he's one of the main conductors of the chaos in the new episodes. 

Selina Kyle Selina Kyle (Camren Bicondova) pictured here in a still from the "Gotham" Season 2 premiere episode "Damned if you Do." Photo: Nicole Rivelli/FOX

Although the growth of the villains will be a major part of Season 2 of "Gotham," we will also get to see the heroes develop. Bruce Wayne (David Mazouz) will continue his rise towards eventually becoming Batman, as he tries to discover the secrets his father Thomas Wayne left behind. Mazouz said he approaches the role by focusing on who Bruce is at this point in time instead of thinking he's playing Batman.

"I'm going backward and moving forward instead of thinking what he (Bruce Wayne) becomes. I do think about Batman and take traits from him and use them in my performance, but typically I just think 'I'm a rich boy who lost his parents,'" Mazouz said.

Sean Pertwee, who plays Alfred on "Gotham," said the cast is more comfortable and relaxed this season, while the scripts also have more substance.

"It's a remarkably different change from Season 1, not to take anything away from Season 1 we're very proud of it, but I think Season 2 has really delivered something operatic, something that was there but just really exploded onto the world," Pertwee said.

Bruce Wayne and Alfred's relationship will continue to grow closer and they will also have some more company in Season 2, with Lucius Fox (Chris Chalk) returning. Chalk said he's excited to play Fox, who was played by Morgan Freeman previously in the Christopher Nolan films.

"He's one of the smartest characters I ever played and he's the most capable guy of any room and manages to never really get in any real trouble," Chalk said."He's too smart to engage in what other people would engage in and it's really exciting to play somebody so concerned about the future of his city and so capable of getting results."

"Gotham" Season 2 premieres Monday, Sept. 21, on Fox at 8 p.m. EDT.