Well, unlike its main character, the wait for Season 2 of "The Flash" was not fast. Fans have been waiting all summer for the return of the popular CW superhero series and now the wait is finally over. The Season 2 premiere airs Tuesday at 8 p.m. EDT on the CW and will pick up right where the Season 1 finale left off, with Barry Allen (Grant Gustin) struggling to contain the rip in space-time created by his battle with Reverse Flash (Tom Cavanaugh). Here's everything viewers need to know before the big Season 2 premiere:

1. Premiere Synopsis

The synopsis for the premiere is out and its juicy! In the wake of all the Season 1 finale drama, Barry will decide to protect Central City on his own in "The Man Who Saved Central City." However, when a new villain, Atom Smasher, attacks, Iris (Candice Patton) will plead with Barry to let his friends help protect the citizens of the city. Meanwhile, Cisco (Carlos Valdes) helps Joe (Jesse Martin) and the two start their Meta Task Force.

2. Episode Titles

The titles for the first three episodes of Season 2 are listed below:

Episode 1 (Oct. 6) -- "The Man Who Saved Central City"

Episode 2 (Oct. 13) -- "Flash of Two Worlds"

Episode 3 (Oct. 20) -- "Family of Rogues"

3. New Caharcyer

There will be a bunch of new speedsters, villains and meta-humans for Barry and the S.T.A.R. Labs team to contend with in the new episodes, including Jesse Quick (Violett Beane), Zoom (Tony Todd), Wally West (Keiynan Lonsdale), Patty Spivot (Shantel VanSanten) and Atom Smasher (Adam Copeland). Things are about to get awfully crowded in Central City!

4. The Curious Case Of Eobard Thawne

How about some old villains? According to Variety, "The Flash" has cast actor Tony Todd to play the central role of supervillain Zoom in the new episodes. The character will make his debut appearance in episode 2 of the CW series' sophomore run.

Here is where it gets interesting. Comic fans know Zoom as Eobard Thawne, a fan of the Flash from the 25th century who develops the same powers by replicating the electrical jolt that gave Barry his super speed. He then uses that speed to travel into the past to meet his hero but, becoming mentally unstable in the process, decides instead to take on the Flash as his rival, thus becoming Reverse Flash (sometimes called Professor Zoom). If that sounds familiar, that 's because Barry already spent Season 1 battling an Eobard Thawne who moonlighted as Reverse Flash -- Harrison Wells (Tom Cavanaugh). The different casting would indicate this is not Tom Cavanaugh's Thawne making a return appearance, but the show has not yet explained the apparent copycat speedster.

So, who is Zoom? And will Harrison Wells return? Apparently, yes. 

"Harrison Wells will be back, but he's going to be a very different Harrison Wells than we've seen before," executive producer Gabrielle Stanton told TVLine. "We've got other worlds. We've got other timelines. All I'm going to say is he's from one of those places."

Fans will have to wait to see how this all fits together. 

5. Relationship Roulette

According to TV Line, the CW cast a very important recurring role for Season 2 that the network describes as “a spunky, fun, funny” romantic interest for the show’s superhero bachelor. The character will be named Wendy and she will be a cop in the Central City police department. The casting call reportedly compares Barry’s new muse to another character from the DC Comics television universe that should have fans excited -- Felicity Smoak (Emily Bett Rickards) from “Arrow.”

In the Season 1 finale of “The Flash,” Barry and Iris acknowledged their feelings for each other, but Iris later reconciled with Eddie (Rick Cosnett) and decided to get engaged to her detective boyfriend. However, later in the episode, during Barry’s climactic confrontation with Eobard Thawne, Eddie shot himself. He realized because he was Thawne’s ancestor, that if he died then the villain would never have existed.

Technically, Iris is now free to connect with Barry, but executive producer Andrew Kreisberg previously told Entertainment Weekly the fallout from Eddie’s untimely death will put a damper on all of the pair’s romantic urges.

“Iris has been with Eddie for a long time and they were living together. [Eddie] didn’t just die, he died to save her. Obviously, Iris is going to be dealing with that," Kreisberg said. “Barry is going to be dealing with the fact that all Barry has ever wanted to do is protect Iris, and in the end it was Eddie who got to do it.”

Will a love triangle develop among Barry, Iris and Wendy?

6. Season 2 Trailer

Watch the traile for "The Flash" Season 2 below: