'The Big Bang Theory' Quiz

Jim Parsons, who plays the ever obsessive compulsive genius Dr. Sheldon Cooper, is the eldest. Parsons was born in 1973.

"The Big Bang Theory" premiered in 2007. The show receives high ratings and consistent renewals, including at least two three-year renewal offers from the network.

That would be Missy. In the 2008 episode "The Pork Chop Indeterminacy," the role was played by actress Courtney Henggeler.

They work at the California Institute of Technology (Caltech) in Pasadena, California.

Jim Parsons (Sheldon) and Johnny Galecki (Leonard) are the two actors that appeared in both pilot episodes.

That would be Simon Helberg, aka, Howard Wolowitz — the space plumber who has no PhD.

You have Chuck Lorre and Bill Prady (among others) to thank for one of the most laugh-out-loud comedy series on television.

Melissa Rauch first gained praise and attention for "The Miss Education of Jenna Bush," her one-woman comedy show.

Although he may not always hit the target the way he intends, Sheldon loves his "bazinga" barbs and witticisms.

Their apartment is on the fourth floor. Since the elevator is nonfunctional, this makes for a long climb, but offers plenty of opportunity for physical humor and conversation.

Raj can usually be seen sporting a sweater vest. A little focused observation will reveal the preferred clothing of other characters, too, like Howard's dastardly belt buckles and dickies.

That would be Amy Farrah Fowler, played by Mayim Bialik. She joined the show in 2010 as Sheldon's not girlfriend.

In this case, life imitates art. Kevin actually did work in a comic book store at one time. Our guess is he'll never have to do that again — uh, unless he wants to.

Amy's apartment number is 314.

Sheldon considers Spock his personal advisor.

Sheldon began using the word bazinga at the end of the show's second season. It was actually coined by Stephen Engel, one of the writers.

Physicists Robert Hofstadter and Leon Cooper both won Nobel Prizes.

Where Jim Parsons and Mayim Bialik learned their instruments as adults (for the show), Johnny Galecki learned the cello as a child and can still play.

Leonard is the one usually wearing specs. Johnny Galecki actually needs vision correction in real life, but prefers contact lenses. To avoid pesky reflection and glare, his costume glasses don't have lenses.

Mayim Bialik received her doctorate in neuroscience in 2007, the same year the show premiered.

Rauch based Bernadette's vocal repertoire on her mom's voice.

Watch for Parson's favorite, number 73. You'll likely see it every once in a while. Parson's was born in 1973.

His positive remarks about the show on Twitter (as well as his participation in the "Star Trek" franchise) helped him get the part.

The show was "Everybody Loves Raymond."

She has an avocado allergy.

Long before it became "The Big Bang Theory," our favorite nerdfest was simply known as "Lenny, Penny, and Kenny."

That would be Kaley Cuoco.

They each make $1 million per episode, as well as undisclosed back-end profits and potential bonuses.

He thought it was a game show. Why? He confused the names Chuck Lorre and Chuck Woolery.

Although never more than glimpsed on screen, Mrs. Debbie Wolowitz was a popular character played by Carol Ann Suzi, who passed away in November 2014. Rather than replace Suzi with another actor, the character of Mrs. Wolowitz was retired. She died in her sleep in the episode "The Comic Book Store Regeneration."