until reruns hit syndication. Since then, its season premieres have routinely ranked

near the top of network TV ratings, and reruns dominate the list of most-watched cable shows.

But for any shows this huge, there are bound to be some big bangs behind the scenes, too…

The Pilot Reconceptualization

The show that's aired for nearly a decade is very different from the original pilot.

Jim Parsons as Sheldon was originally a horndog. His character was changed to someone mystified

by romance:

"I have seen 6 women naked. Some of them weren't even relatives."

Kaley Cuoco’s Penny was also absent. Instead, the attractive neighbor was the unfriendly

Katie, played by Amanda Walsh. Johnny Galecki as Leonard wore suits instead of hoodies.

And there was one other change: the theme song was Thomas Dolby's "She Blinded Me With

Science." CBS passed, but asked creators Chuck Lorre and Bill Prady to rework the show and

submit another pilot. They did, adding an original theme by Barenaked Ladies, and made

it to air in 2007.

The Bernadette Vocalization

Bernadette's mousy, high-pitched voice, and loud moments of screaming rage, don't come

naturally to actress Melissa Rauch.

"She said I'm a wonderful girl and that you're lucky to have me."

"Where are you going?"

"To the toilet, is that ok with you?!"

Although she doesn't sound like Bernadette in real life, Rauch took her inspiration from

a source close to home: her own mother:

"They'll say things like, 'I went to the grocery store and I had to return something and they

sent me to three different counters. It was a real circle jerk!'"

The Paycheck Extortion

In 2014, production of the show's eighth season was delayed due to contract re-negotiations

between the cast and Warner Brothers. Ultimately, CBS renewed the show for an unprecedented

three seasons, keeping it on the air through 2017. Jim Parsons, Johnny Galecki, and Kaley

Cuoco each secured a salary of $1 million per episode.

Meanwhile, Simon Helberg and Kunal Nayyar re-negotiated their new contracts collectively,

ending up with salaries of around $750,000 per episode. A settlement was reached the

day before their old contracts expired, but the duo would've reportedly been written out

of the show if they hadn't accepted the deal.

The Relationship Obfuscation

Kaley Cuoco has often appeared in tabloids due to her brief marriage to tennis player

Ryan Sweeting. Still, she avoided the spotlight during her previous relationship, even though

it was with a noteworthy co-star. Cuoco and Johnny Galecki dated from 2007 to 2009 and

kept it a secret from not only the media, but from the Big Bang cast and crew:

"We totally fell for each other and just really wanted to keep it as close to ourselves as

possible, and we had an amazing relationship."

The Mayim Bialik Manifestation

In the 2008 episode "The Bat Jar Conjecture," Sheldon quits the group's physics bowl team.

Raj aims high in his suggestion for a replacement:

"You know who is apparently very smart is the girl who played TV's Blossom. She got

a PHD in neuroscience or something."

"Raj, we're not getting TV's Blossom to join our Physics Bowl team."

That actress is Mayim Bialik, who later joined the cast as Amy Farrah Fowler. Also under

consideration for the role was actress and musician Kate Micucci. She was edged out for

the part, but producers liked her so much that they wrote her in anyhow, as Lucy, the

extremely introverted woman Raj briefly dates.

The Soft Kitty Misappropriation

"Soft kitty warm kitty little ball of fur. See that's where you would come in."

Co-creator Bill Prady says he heard Sheldon's special calm-down song at his daughter's preschool.

Assuming it was public domain, he added it to the show, where it's been used multiple

times and on Big Bang merchandise.

In 2015, however, the family of a teacher named Edith Newlin sued CBS. Allegedly, the

show lifted lyrics from Newlin's 1937 song "Warm Kitty." The main difference? The original

1937 lyrics switch the first two lines from the song we now know and love. This whole

thing could make for one rich kitty...

"Happy kitty sleepy kitty purrr purrr purrrrr!"

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