The "Big Bang Theory" season 8 episode 22 marks the final lap of the season, which has seen a number of advances for each and every one of the characters of the popular and beloved CBS show - and now things will be getting even more grown-up for some of them.

The past season ended with Penny (Kaley Cuoco) and Leonard (Johnny Galecki) becoming engaged after years of an on-again-off-again relationship, but things have gotten a bit stalled from then on - but now, it seems like the "Big Bang Theory" season 8 episode 22 will finally see them setting a wedding date, when Sheldon (Jim Parsons) forces them to.

Over the course of the season, Penny has been pursuing a new career in pharmaceutical sells after years of trying to make it as an actress in New York, and in the last episode she seemed to decide to quit acting altogether - and the "Big Bang Theory" season 8 episode 22 sees her taking yet another big grown-up step.

According to International Business Times, one of the biggest storylines in the "Big Bang Theory" season 8 episode 22 sees some major advancement in two of the show's relationships: Leonard and Penny plus Sheldon and Amy (Mayim Bialik).

As Sheldon prepares to take the (widely expected) next step with Amy, he realizes that this type of advance should be all encompassing to the people around him - and so in the "Big Bang Theory" season 8 episode 22, he pushes his roommate and his girlfriend to finally set a wedding date.

Latin Post reports that the new episode will also alter things completely for another character: Raj (Kunal Nayyar), as his very rich father in India decides to finally cut him off, creating further problems between his parents, who are already in the middle of a divorce.

According to Carter Matt, there's also a frightful comment from Bernadette (Melissa Rauch), as she tells the guys to call tech support ... something they couldn't have taken lightly.

In any case, you can watch the "Big Bang Theory" season 8 episode 22 previews below!