Kaley big bang theory season 8 spoilers Penny (Kaley Cuoco-Sweeting) and Bernadette (Melissa Rauch) will be working together in "The Big Bang Theory" Season 8, but they might have some trouble getting along in the premiere. Photo: CBS/Michael Yarish/WBEI

“The Big Bang Theory” will return to CBS on Sept. 22 with a one hour premiere, and we’ve got plenty of spoilers to prepare you. The Season 7 finale had Sheldon (Jim Parsons) running away, Penny (Kaley Cuoco-Sweeting) getting fired from a movie, and Raj (Kunal Nayyar) getting a new girlfriend. So what’s in store for Season 8? Find out below:

1. Penny’s New Hair Cut

“The Big Bang Theory” won’t be putting any extensions or wigs on Penny in Season 8. Expect Kaley Cuoco-Sweeting’s new pixie cut to debut in the premiere. The actress initially asked producers for permission to cut a few inches off but ultimately went much shorter. “There was a lot of talk about doing extension and something else,” she said. “I had a talk with the writers who loved it and they were great about it.”

Watch Cuoco-Sweeting talk about her hair below:

2. Raj And Emily Are Still Together

The season will start with Raj and Emily (Laura Spencer) still together and very excited about their new relationship. “They are still in the honeymoon of that,” showrunner Steve Molaro told TV Line. “And as we get through the season, we will explore more of her personality and what she’s really like.”

3. Penny’s New Job

It looks like Penny will give up acting temporarily. Bernadette (Melissa Rauch) will help her get a job as a pharmaceutical representative. However, Leonard (Johnny Galecki) might be a little uneasy about Penny’s newfound path. “She's going to start making some money, which will unbalance their relationship as the power shifts,” co-creator Chuck Lorre told the Hollywood Reporter. “She's going to find some confidence and self-esteem, which acting does not provide in great heaping doses.”

4. Sheldon’s Failed Trip

At the end of “The Big Bang Theory” Season 7, Sheldon left on a train to travel because he couldn’t deal with all of the changes happening in his life. The trip wasn’t exactly a success. "He's gone for 45 days," Molaro explained to the Hollywood Reporter. “And it doesn't end as well as he'd like with him having all of his belongs stolen while he was asleep in the sleeper car.”

5. Sheldon And Amy Drama

When Sheldon’s road trip comes to an end, he calls Leonard to pick him up in Arizona. Amy (Mayim Balik) is going to be offended that he didn’t call her. However, Molaro assured fans that the drama wouldn’t last for too long. "That hurts her feelings," Molaro told TV Guide. "The good news is that is a conversation that is had and addressed in a fairly sweet moment."

6. Bernadette vs. Penny

Amy will pit Bernadette and Penny against each other in Season 8 episode 2. Actress Mayim Balik couldn’t give many details to Glamour about why Amy creates tensions between the women, but Penny’s new job might affect the fight. Working at the same company could create some new tension for the ladies.

7. Sheldon Is A Teacher

In the second half of the “The Big Bang Theory” Season 8 premiere, Sheldon will take a job teaching a class. Things will get even weirder when Howard (Simon Helberg) decides to take the course, according to the episode synopsis.

“The Big Bang Theory” Season 8 will premiere Monday, Sept. 22 at 8 p.m. EDT on CBS with two back-to-back episodes. Which character are you most excited to see again? Sound off in the comments section below!