[SPOILER ALERT! THE FOLLOWING ARTICLE CONTAINS DETAILS FROM 'THE FLASH' SEASON TWO EPISODE 'FLASH OF TWO WORLDS']

The second episode of 'The Flash' Season Two opened up several possibilities, including a budding romance between Caitlin Snow (Danielle Panabaker) and Jay Garrick (Teddy Sears) as well as the fact that Dr. Harrison Wells (Tom Cavanagh) has not been completely erased from existence because he still exists in Earth 2.

So will the Reverse-Flash be coming back to Earth 1? Or will we simply see Wells in Earth 2?

"Since we introduce Earth 2, there's always a possibility we'll go there," episode co-writer Aaron Helbing revealed to TVLine. "Not necessarily early on, but you'll see more of it, yes."

Aaron's brother and co-episode writer Tom Helbing confirmed that they are eager to have Tom Cavanagh return as Wells in the second season.

"If it were up to me, I'd have Tom Cavanagh in every show," he said. "He's amazing. It's such a unique opportunity to have a character that everybody fell in love with and everybody hated at the same time and try to reinvent him in a different way. That was always the plan. It was just a challenge to figure out how to do that and have it be satisfactory."

The two writers also confirmed that the new villain is much more dangerous than Reverse Flash.

"Zoom is just like your worst nightmare," Tom explained. "He's going to come in and if he doesn't get these [villains] to do what he wants, he's going eventually show up and try to take [Barry] down himself. He's the scariest speedster on the planet."

Aaron Helbing explained how Zoom is different from Wells.

"Wells had a bit of a conscience now and then when it came to Barry. Zoom wants to kill Barry," he said.

So what are the chances that Barry and his team will defeat Zoom?

"It's very bad," Todd Helbing said. "There are 52 breaches and Zoom can come through any of them with whoever he wants, so they have to figure out quickly how to manage the biggest threat to them."

'Flash of Two Worlds' aired on October 13. The third episode, 'Family of Rogues,' will air on The CW on October 20.