The Big Bang Theory
Things get weird when Sheldon (Jim Parsons, right) apologizes to Howard (Simon Helberg, left) and the gang in episode 13 of "The Big Bang Theory" Season 9. CBS

Sheldon Cooper (Jim Parsons) can be a lot to handle. On "The Big Bang Theory," the often abrasive, socially awkward scientist has a knack for getting on his friends' nerves. Fortunately, he is a little more self aware in Season 9. However, the promo for episode 13, "The Empathy Optimization," reveals that even when Sheldon is apologizing for being annoying, he can still be pretty, well, annoying!

According to the synopsis for episode 13, Penny (Kaley Cuoco), Leonard (Johnny Galecki), Bernadette (Melissa Rauch), Howard (Simon Helberg), Raj (Kunnal Nayyar) and Emily (Laura Spencer) decide to head to Las Vegas for the week on a party bus! However, they plan on leaving Sheldon, who has had a bad attitude lately (and a bad cold), behind. Sheldon does not want to be left out, so he decides to go on an apology tour, saying sorry to each of his friends individually, in the hopes of getting them to change their minds about the trip.

Now the promo for the episode reveals that, while Sheldon's heart may be in the right place, his apology game might need a little work. The scientist's unconventional mea-culpa include surprising Penny in the shower, gifting Howard and Bernadette a pair of "Sheldon Apologized to Me" t-shirts, and rehearsing his apology speech to Raj ... in front of Raj.

Things are going to get a little weird, but Leonard is cautiously optimistic about the Sheldon Cooper Apology Tour 2016.

"I hope it's as much fun as the Sheldon Cooper spell checks local menus tour," jokes Leonard.

Watch the promo for episode 13 below:

Will Sheldon's plan work, or will the gang go to Las Vegas without him? Fans will have to wait to find out. "The Big Bang Theory" airs Thursdays at 8 p.m. EST on CBS.

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