Big Bang Theory season 9 episode 5
Sheldon and Amy will go on a lunch date in The Big Bang Theory season 9 episode 9CBS

Sheldon and Amy will hang out as friends and spend Thanksgiving together at the aquarium in the upcoming chapter of The Big Bang Theory. Episode 9 is titled, The Platonic Permutation, where business magnate and inventor Elon Musk appears as himself in the CBS show.

According the synopsis, "Sheldon and Amy try hanging out as friends when they spend Thanksgiving together at the aquarium. Also, Wolowitz reluctantly agrees to volunteer at the soup kitchen with Bernadette, Raj and Emily, and Penny discovers that Leonard knows more about her than she thought."

Leonard and Penny spend their first Thanksgiving dinner as a married couple, and Penny discovers that her husband knows more about her than she thought. According to a leaked report, Leonard accidentally reveals that he read Penny's journal, and to apologise for his actions he wears the lingerie he got her for Valentine's Day.

Big Bang Theory Season 9
Elon Musk with Howard Wolowitz in Big Bang Theory Season 9 episode 9CBS

Also, Howard reluctantly agrees to volunteer at the soup kitchen with Bernadette, Raj and Emily. But he meets Elon Musk, who is one of Howard's heroes, and they talk about things including his astronaut job. Musk even tells him that he would call Howard if he has another job for him.

Sheldon and Amy catch up on their lives at the aquarium and they also play a fish naming game. Amy admits that she enjoys his company and that she misses it. Later, when they are both home, Sheldon is seen talking to Amy on the phone. Amy says that she had a good time and asks him if she can be his girlfriend again. However, Sheldon thinks she just wants them to be friends, and says, "I excel at many things, but getting over you (or being your boyfriend) is not one of them. I think we should just be friends."

Do you think Sheldon and Amy will get back together? To see how it unfolds don't miss The Big Bang Theory season 9 episode 9 next Thursday, 19 November at 8pm EST on CBS Network.