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Leonard's New Job
Watch The Big Bang Theory Season 6 Episode 24
"The Bon Voyage Reaction"
Original Air Date:

In the season 6 finale of The Big Bang Theory, Penny and Sheldon are shocked when Leonard considers taking a great job opportunity overseas.

Do Girls Play?
Watch The Big Bang Theory Season 6 Episode 23
"The Love Spell Potential"
Original Air Date:

The women end up playing Dungeon and Dragons with the boys when their vacation to Vegas is called off on The Big Bang Theory.

Professor Proton
Watch The Big Bang Theory Season 6 Episode 22
"The Proton Resurgence"
Original Air Date:

Bob Newhart guest stars as Professor Proton, the host of Sheldon's favorite childhood TV show on The Big Bang Theory.

Trouble With Closure
Watch The Big Bang Theory Season 6 Episode 21
"The Closure Alternative"
Original Air Date:

When Sheldon's favorite TV show ends before its proper conclusion, Amy tries to help him deal with the loss on The Big Bang Theory.

Roadblocks to Tenure
Watch The Big Bang Theory Season 6 Episode 20
"The Tenure Turbulence"
Original Air Date:

The guys compete for tenure and shamelessly schmooze committee members including an HR person who has already had a run in with Sheldon on The Big Bang Theory.

The Cocktail Party
Watch The Big Bang Theory Season 6 Episode 19
"The Closet Reconfiguration"
Original Air Date:

On The Big Bang Theory, Howard uncovers a letter from his father who had left the family years before but he's unsure he wants to read it.

The Junior High Presentation
Watch The Big Bang Theory Season 6 Episode 18
"The Contractual Obligation Implementation"
Original Air Date:

Sheldon, Howard, and Leonard give a presentation on careers in science to a group of junior high girls on The Big Bang Theory.

Koothrapali Refuses to Leave
Watch The Big Bang Theory Season 6 Episode 17
"The Monster Isolation"
Original Air Date:

Sheldon gets to witness Penny's acting talents up close and Koothrapali's date walks out on him on The Big Bang Theory.

Penny & Leonard's Valentine's
Watch The Big Bang Theory Season 6 Episode 16
"The Tangible Affection of Proof"
Original Air Date:

Everything goes awry when Leonard arranges a special Valentine's Day celebration for Penny and her ex shows up and Sheldon has his research assistant find a present for Amy on The Big Bang Theory.

Leonard & Sheldon's Fight
Watch The Big Bang Theory Season 6 Episode 15
"The Spoiler Alert Segmentation"
Original Air Date:

Leonard moves in with Penny after he and Sheldon have a fight, meanwhile with Howard away on a trip Raj keeps on eye on Mrs. Wolowitz.

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TBBT Quotes

I won't say that all senior citizens who can't master technology should be publicly flogged, but if we made an example of one or two, it might give the others incentive to try harder.

Sheldon

Sheldon: Why do you have the Chinese character for "soup" tattooed on your right buttock?
Penny: It's not "soup," it's "courage."
Sheldon: No it isn't. But I suppose it does take courage to demonstrate that kind of commitment to soup.
Penny: How'd you see it? You said you wouldn't look.
Sheldon: Sorry. As I told you, the hero always peeks.