Leonard will butt heads with Sheldon once again before they manage to agree on something, according to episode 12 spoilers of the season 8 of "The Big Bang Theory."

According to the synopsis, which teased episode 12 spoilers for "The Big Bang Theory" season 8, "The girls take Leonard and Sheldon shopping while Raj worries about his contribution to a space probe operating."

This episode is called "The Space Probe Disintegration."

But the extended synopsis claimed that everybody are concerned with their respective lives to be focused on each other's. Raj for his part is worried about whether or not his experiment works now that the Horizon spacecraft has landed.

Being fatalistic, Raj crumpled papers into little balls and shot them at the garbage bin with the wish that if he makes all his shots, the space probe will be a success. Raj doesn't miss a single shot. Howard helps him forget about his anxiety by taking him to a Hindu temple.

Penny, Bernadette and Amy have managed to convince the boys to do something that they like for once, since the girls feel that they are always the ones compromising.

"The other guys are still wondering what to do. First they talk about seeing the Philharmonic, play and finally they decide on shopping, Penny's favorite past-time," it said.

What's more important here, however, is Leonard and Sheldon's relationship now that the former is ready to move in with Penny.

"Leonard hasn't moved in with Penny because the last time he mentioned it, Sheldon ran away," the spoilers said. "Sheldon can't think of a life without his best friend in it. They both start to cry and Sheldon tells him that he should move out if that what he really wants to do."

Watch out for more "The Big Bang Theory" season 8, episode 12 spoilers ahead of the airing date on January 8, 2015.