Johnny Galecki as Dr. Leonard Hofstadter -- Big Bang Theory - The Big Bang Theory

Johnny Galecki as Dr. Leonard Hofstadter -- Big Bang Theory - The Big Bang Theory

It's not a total shocker that a man with a smile like Leonard's would finally score a woman like Penny.
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The Graduation Transmission Scene - The Big Bang Theory Season 8 Episode 22

The Graduation Transmission Scene - The Big Bang Theory Season 8 Episode 22

The gang is pretty much all here. This is a photo from The Big Bang Theory episode "The Graduation Transmission."
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Sexy Grads - The Big Bang Theory

Sexy Grads - The Big Bang Theory

Sexy graduates have their day on The Big Bang Theory. "The Graduation Transmission" is the 22nd episode of the show's eighth season.
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The Message - The Big Bang Theory

The Message - The Big Bang Theory

The guys battle over how to construct a message for NASA on The Big Bang Theory. "The Communication Deterioration" is the 21st episode of the show's eighth season.
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Return of Wil Wheaton - The Big Bang Theory Season 8 Episode 20

Return of Wil Wheaton - The Big Bang Theory Season 8 Episode 20

Look who's back on The Big Bang Theory! Yup, Wil Wheaton makes another appearance in this scene.
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The Fort Test - The Big Bang Theory

The Fort Test - The Big Bang Theory

Sheldon faces a relationship crossroad with Amy when they build a blanket fort on The Big Bang Theory. "The Fortification Implementation" is the 20th episode of the show's eighth season.
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Sheldon, All Dressed Up - The Big Bang Theory Season 8 Episode 19

Sheldon, All Dressed Up - The Big Bang Theory Season 8 Episode 19

Here is a look at Sheldon in an unusual outfit. It's a photo from The Big Bang Theory episode "The Skywalker Incursion."
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Ping Pong Battle - The Big Bang Theory

Ping Pong Battle - The Big Bang Theory

Raj and Amy offer to settle an argument with a game of ping pong on The Big Bang Theory. "The Skywalker Incursion" is the 16th episode of the show's eighth season.
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Sneaking a Peek - The Big Bang Theory Season 8 Episode 18

Sneaking a Peek - The Big Bang Theory Season 8 Episode 18

Hey, what you working on? Sheldon sneaks a peek in this scene from The Big Bang Theory.
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The Family Dinner - The Big Bang Theory

The Family Dinner - The Big Bang Theory

The gang gets together for a family dinner in honor of Mrs. Wolowitz on The Big Bang Theory. "The Leftover Thermalization" is the 18th episode of the show's eighth season.
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Going to Mars - The Big Bang Theory

Going to Mars - The Big Bang Theory

Amy finds out that Sheldon applied for a one-way trip to Mars on The Big Bang Therapy. "The Colonization Application" is the 17th episode of the show's eighth season.
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The Love Experiment - The Big Bang Theory

The Love Experiment - The Big Bang Theory

Penny and Sheldon design an experiment made to get the participants to fall in love on The Big Bang Theory.
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TBBT Quotes

Leonard: Hi. I'm Leonard. You are beautiful. You pop, sparkle and buzz electric. I'm going to pick you up at eight, show you a night you will never forget.
Raj: Where are we going?

Penny: Hey, Sheldon, did you change your Wi-Fi password again?
Sheldon: Yes, it's "Penny, get your own Wi-Fi." No spaces.