The Big Bang Theory at Comic-Con: That's Stephen Hawking!

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The Big Bang Theory broke out the big gun at this morning's Comic-Con panel inside a packed Ballroom 20 for its panel discussion.

Moderated by star Melissa Rauch, the event kicked off with Stephen Hawking giving a pre-taped message... and covering the entire Big Bang in just 17 words. Watch him get the Q&A session started now:

Among other surprises, the panel took a question from a fan dressed as the Star Wars bounty hunter "Boushh," who turned out to be Johnny Galecki! He ended up joining a group on stage that included:

Executive producer/showrunner Steve Molaro and co-creator/executive producer Bill Prady; co-executive producers Dave Goetsch, Steve Holland, Eric Kaplan and Jim Reynolds; supervising producer Maria Ferrari and science consultant David Saltzberg.

With The Big Bang Theory Season 7 set to debut on September 26, the panel also included a look back at highlights from The Big Bang Theory Season 6. Watch that fun montage now:

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.

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TBBT Quotes

Sheldon: I'll have a diet Coke.
Penny: Can you please order a cocktail? I need to practice mixing drinks.
Sheldon: Fine... I'll have a virgin Cuba Libre.
Penny: That's... rum and Coke without the rum.
Sheldon: Yes, and would you make it diet?

Oh, Bernadette, please play my clarinet.

Raj's poem