Executive producer Steve Molaro revealed a lot of "Big Bang Theory" spoilers for season 10. Among the big reveals are Katey Sagal's addition to the cast as Penny's mother Susan and Jack Mcbrayer as penny's ex- convict brother.

Fans also witness Penny's struggle with her career. Season 10 will probably delve into her decision to continue her job as a sales representative in Bernadette's pharmaceutical company or follow her dreams. Regardless of the options, Molaro promised that viewers will see a growth of her professional career.

"We're still figuring things out; I think she's in an interesting and relatable place. She's going to start to weigh her options," he revealed at Comic-Con 2016.

Viewers would also want to see what would become of Sheldon and Amy's relationship. Last season, before they broke up Sheldon was planning to propose to Amy, which she later found out. Even if there will be no proposal for the next installment, Sheldon will fulfill one of his dream, which is to attend a real-life flag convention.

Melissa Rauch, who is portraying Bernadette, said at an interview with TVLine at the SDCC 2016 that she is very excited to get a belly on set although she hasn't been fitted for a baby bump prosthetic.

Molaro hinted that fans will see the baby belly very soon. "I think - because you're not the tallest of gals - we should make you impossibly fat that you're like wider than you are tall," Molaro said to Rauch.

"So when I enter Sheldon's apartment, you'll see my belly enter first," Rauch answered.

When asked if the baby will be seen in season 10, Molaro answered, "So far that's the plan, yes." Fans can expect a little addition to the cast along with Sagal and Mcbrayer.

The series contract is to last until season 10 so there are a lot of speculations regarding its end. When asked about the last installment at Comic Con, Molaro simply answered, "I'm not gonna tell you. There's been a few thoughts that have floated around, but we don't really know how long the show's going to go on for, so I think it's a little early for us to be thinking about an end point."

But he did say that he will reveal any decision that they will come up after two weeks regarding the shows continuation or its wrap-up for a last season.

The Big Bang Theory Season 3" will premiere on September on CBS.