By Natalie Abrams
Updated September 16, 2015 at 07:55 PM EDT
Credit: Sonja Flemming/CBS

Wedding bells will be ringing on the season premiere of The Big Bang Theory — and EW has an exclusive first look!

When the CBS comedy returns, Leonard (Johnny Galecki) and Penny (Kaley Cuoco-Sweeting) have arrived in Las Vegas and are determined to get hitched — despite his admission of kissing another woman during his North Sea trip.

“The show is moving forward in big brave ways and so are Leonard and Penny,” executive producer Steve Molaro tells EW, noting that while the relationship is currently strained, Penny “thinks she can get past this.” “She knows they’ve been together a long time. She’s telling herself, ‘It was years ago and we weren’t married and it was only making out. I can get past this. Let’s keep moving forward.'”

“People have rocky patches in their lives — Sheldon and Amy and Leonard and Penny and you can either give up or you can work on them,” Molaro continues. “I would say, for both couples, sometimes things need to get worse before they get better.”

The Big Bang Theory returns Monday, Sept. 21 at 8 p.m. ET on CBS.

WANT MORE EW? Subscribe now to keep up with the latest in movies, television and music.

Episode Recaps

The Big Bang Theory

Sheldon, Leonard, Penny, Raj, and Wolowitz, Amy, Bernadette—the gang keeps growing. Bazinga!

  • TV Show
  • 12
  • CBS
stream service