'Big Bang Theory' Cast Goes to Prom! See Their Old High School Photos


We take the 'Big Bang' cast on a little blast from the past.

Grab your corsage because The Big Bang Theory is going to prom!

In tonight's episode, Bernadette (Melissa Rauch) and Amy (Mayim Bialik) host a "Prom Night" since most of them either didn't go to prom or had unfavorable memories of that seminal high school experience.

"The gang has, I guess what you could call an adult prom re-do on the roof of the apartment building," executive producer Steve Molaro told ET. "None of them have ever really had a good prom for various reasons and Bernadette and Amy spearhead having a re-do for everybody. It just turned out so wonderful, I can't wait for it to be on TV."

VIDEO: 6 Things You Didn't Know About 'The Big Bang Theory'


This will be the first time the group has been back up to the roof since Howard (Simon Helberg) and Bernadette (Rauch) tied the knot!

For all you Shamy fans, Molaro also teases that tonight is a big step forward in Sheldon (Jim Parsons) and Amy's (Bialik) relationship. Could this next step finally mean coitus?

"That's one of the secrets I'm going to keep," Molara says.

VIDEO: Three Set Secrets of 'Big Bang'

"I think we're as together as we need to be right now," Bialik told ET. "We sort of keep riding that wave of enjoying each other the way we are and wanting more, but accepting the other person where they are. I think it's really sweet like this."

While Sheldon and Amy steer clear of the bedroom, are Penny (Kaley Cuoco-Sweeting) and Leonard (Johnny Galecki)avoiding the altar?

"I don't see it happening soon since considering it took them seven years to get engaged," Cuoco-Sweeting says.

"There's a whole new world of problems now," Galecki adds. "If there's anyone that's been engaged before knows, that doesn't solve everything between a couple."

Watch the full video for a peek at tonight's prom-themed episode and to see the cast's reaction when we showed them their old high school photos

Follow Denny on Twitter @DDirecto.