08/28/2013 01:02 am ET

'The Big Bang Theory' Season 7 Premiere: Sheldon And Penny Get Close In Leonard's Absence (PHOTO)

While Leonard's away, Sheldon and Penny will play! CBS has released the episode description and first photo from the "Big Bang Theory" Season 7 premiere, and it looks like the unlikely duo will be making the most of Leonard's time at sea by bonding -- but what happens when he returns? Check out the photo and episode summary for the hourlong premiere below.

“The Hofstadter Insufficiency” and “The Deception Verification” –- Sheldon (Jim Parsons) and Penny (Kaley Cuoco) share intimate secrets while Leonard (Johnny Galecki) is away at sea, later, Sheldon’s feelings are crushed when Leonard returns. Meanwhile, Raj (Kunal Nayyar) gets consoled about his ex-girlfriend and Wolowitz’s (Simon Helberg) relationship with his mother causes an unusual threat to his masculinity. Regina King returns as Mrs. Davis, the University’s Director of Employee Relations, and Kevin Sussman returns as Stuart, the comic book store owner.

'The Big Bang Theory'

Although "Big Bang" has been on for the better part of a decade now, the stars see no end in sight, with Parsons recently telling Emmy magazine, "Part of me thinks this show could go 11 or 12 years ... We seem to be a bit of an anomaly in that we’re holding on to a sizable audience, and it doesn't fluctuate."

Co-star Galecki agreed, "Not to make any predictions whatsoever, but as far as the lifeline of most shows, the seventh year, you're past the halfway mark. I personally don't feel like we've told half the stories that these characters have to tell. It doesn't feel to me like we're halfway through. I'm certainly not done working with all of these people."

For more on "Big Bang" Season 7, check out HuffPost TV's Comic-Con interview.

"The Big Bang Theory" Season 7 premieres Thursday, Sept. 26 at 8 p.m. ET on CBS.