Credit: Michael Yarish/CBS ©2012 CBS Broadcasting, Inc. All Rights Reserved Photo: Big Bang Finale: Penny, Leonard, Sheldon

This Thursday’s Big Bang Theory finale may be a dash to the altar for one couple, but it’s how the other couples on the show react to the idea of Howard Wolowitz’ special day that makes the Season 5 finale really interesting. Wetpaint Entertainment was on hand during a recent screening of the finale with exec producer Bill Prady and star Simon Helberg to talk about how the big day will go down. (And, of course, what will happen to Leonard after his surprise proposal during last week’s episode!)

On the May 10 episode, Wolowitz (Simon Helberg) and Bernadette (Melissa Rauch) decide, after his launch to space gets pushed up and ruins the plans for their original wedding, that they want to get married before his departure. What’s the gang to do but rush to put on a quickie wedding for the lovebirds!

We discover, in the process, that Amy (Mayim Bialik) has a not-so-slight obsession with being a bridesmaid, and appears to believe it’s her big day, while Sheldon (Jim Parsons) takes offense to not being allowed to perform the ceremony in Klingon. And Raj (Kunal Nayyar)? The poor guy is just a mess (though he does figure out a way to speak to girls).

Of course, Leonard (Johnny Galecki) and Penny (Kaley Cuoco) are in no position to plan a wedding, after what happened on last week’s episode. Leonard’s spontaneous post-coitus proposal is still rocking this couple’s boat.

“The aftermath of what Leonard did, that kind of thing can’t be swept under the rug,” says Prady. “They could come back from this, they could not come back from this. They have very strong feelings for each other and their issues have to do with what they currently want in their lives right now.”

But while planning a wedding triggers strange and comedic emotions in all the Big Bang characters, the finale really belongs to Simon Helberg, who spends most of the episode in a replica of the Soyuz Capsule with real-life NASA astronaut Mike Massimino.

“There was a lot of sweating,” Simon tells Wetpaint Entertainment. “But the most uncomfortable part was – and I guess it’s accurate – the size of that capsule. It’s very tight, and we didn’t get out, we shot all the scenes in sequence. But it was very cool to be there with an actual astronaut.”

Will Wolowitz make it to space? Will he do so as a married man? Tune in on Thursday to find out. And no Big Bang fan will want to miss the last few seconds of the show, which may turn out to be the most surprising and heartwarming of all.

The Soyuz replica is temporarily on display as part of the Warner Brothers TV exhibit, Television: Out of the Box, at the Paley Center in Los Angeles until May 17.

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