The Big Bang Theory uses a science consultant, David Saltzberg, who has a PhD in physics, on a regular basis to make sure they get the science correct on the show. He also sometimes gets help from Mayim Bialik.
Believe it or not, even though his character is totally obsessed with Star Trek, Jim Parsons has actually never seen an episode.
Raj's Character is Based on a Real Person
Raj, who in earlier seasons wasn't able to talk to women unless he was drunk, is based on one of executive producer Bill Prady's previous co-workers.
The Origin of "Bazinga"
Sheldon's catchphrase, "Bazinga" was inspired by on-set pranks. Writer Stephen Engel would say "bazinga" every time he pulled off a successful prank on his coworkers.
Though the writers have stated that they didn't create Sheldon's character based on Asperger Syndrome, actor Jim Parsons has said he plays the character as having those traits. Additionally, Bill Prady once stated, "Our feeling is that Sheldon's mother never got a diagnosis, so we don't have one."
We Still Don't Know Penny's Maiden Name
And it seems like we may never find out. At least that's what producer Steve Molaro says. We'll just have to keep guessing, or just think of her now as Penny Hofstadter.
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