Robbie Amell Robbie Amell

When Caitlin Snow's (Danielle Panabaker) fiancé Ronnie (Robbie Amell) returns to The Flash this season, things are going to be very different for the former scientist. But then again, coming back from the dead and becoming one half of the superhero Firestorm does that to you.

"The next time we see Ronnie as an audience, you don't recognize him. It's almost like he's a totally new person," Panabaker reveals, before teasing the "trauma" of discovering Ronnie's alive. "Maybe she's losing her mind thinking he's coming back to life" the actress explains.

QUIZ: Grey's Anatomy or Florida news story?

And as if Ronnie being merged with a nuclear physicist (Victor Garber) won't be enough of an obstacle for the couple, Ronnie and Caitlin's future will also have a major wrench thrown in it if fans get their way. There's already a pretty passionate call for a Caitlin-Barry (Grant Gustin) romance (as if Barry isn't juggling enough women).

"I think right now the relationship between Barry and Caitlin is just friendly, but they're bonding. They have a very special connection," Panabaker says. Though she concedes, "I do like the ship name SnowBarry. I think it's cute."

See what else The Flash stars reveal — including Barry's surprising new friendship.

(Full Disclosure: is owned by CBS, one of The CW's parent companies.)