The bat signal has been turned on. Before some new villains start causing chaos in Gotham City, people will have the opportunity to watch the entire first season of "Gotham" on Netflix, which is making it available Sept. 21.

Netflix subscribers who missed out on Season 1, or want to see it again, will have the opportunity to watch all 22 episodes of the first season. They can block out their schedules and binge-watch with the hope that they can be caught up in time for Season 2 of "Gotham,” which premieres Monday, Sept. 21, on Fox at 8 p.m. EDT -- the same day Season 1 is expected to be available.

Showrunner Bruno Heller told fans at San Diego Comic-Con in July that the freshman season was about old-school Gotham, while the sophomore installment will take a new turn. “This season, it’s the rise of the villains,” he previewed in a TVLine report, as the city “starts to decline into chaos. 

One of the trailers highlights the “Rise of the Villains,” as Season 2 will feature many new enemies, including the whip-wielding Tigress, Joker and several other enemies that Detective James Gordon (Ben McKenzie) will be facing. It is also rumored that the villain Mr. Freeze also will appear this season, Cinema Blend notes.

You can watch one of the trailers below.

So what does Season 1 have in store for those who haven't seen it? In episode 1, James Gordon and Harvey Bullock (Donal Logue) are assigned to track down the killer of Thomas (Grayson McCouch) and Martha Wayne (Brette Taylor). Viewers will meet villains Oswald Cobblepot, aka Penguin (Robin Lord Taylor), Fish Mooney (Jada Pinkett Smith), Edward Nygma, aka The Riddler (Cory Michael Smith) and a young Catwoman, Selina Kyle (Camren Bicondova).

"Gotham" tells the story behind Gordon's rise to commissioner in Gotham City in the years before Batman arrives and many of the villains come of age. "Gotham" will air Mondays at 8 p.m. throughout the fall.