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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.

Sheldon Reacts Badly
Watch The Big Bang Theory Season 6 Episode 14
"The Cooper/Kripke Inversion"
Original Air Date:

Sheldon reacts badly when he is forced to work with his arch nemesis Barry Kripke and Raj and Howard buy action figures of themselves on The Big Bang Theory.

Star Trek Road Trip
Watch The Big Bang Theory Season 6 Episode 13
"The Bakersfield Expedition"
Original Air Date:

On The Big Bang Theory the boys head off to a comic book convention dressed as characters from Star Trek: The Next Generation.

Sheldon's Jenga
Watch The Big Bang Theory Season 6 Episode 12
"The Egg Salad Equivalency"
Original Air Date:

Will Sheldon take Leonard, Raj, and Howard down with him when his is accused of sexual harassment on The Big Bang Theory.

A Girl for Koothrappali
Watch The Big Bang Theory Season 6 Episode 11
"The Santa Simulation"
Original Air Date:

Sheldon remembers past Christmases during a game of Dungeons and Dragons while the ladies try to find a girl for Koothrappali on The Big Bang Theory.

Sheldon the Caretaker
Watch The Big Bang Theory Season 6 Episode 10
"The Fish Guts Displacement"
Original Air Date:

On The Big Bang Theory, Wolowitz goes on a fishing trip with his father-in-law while Sheldon takes care of a sick Amy.

Sheldon's Parking Space
Watch The Big Bang Theory Season 6 Episode 9
"The Parking Spot Escalation"
Original Air Date:

The whole gang gets involved when the university reassigns Sheldon's parking spot to Wolowitz on his return from space on The Big Bang Theory.

TBBT Quotes

Penny, there's only one cookie with something in the middle that solves life's problems, and that's an Oreo. Or a Nutter Butter, if you're in a pinch.

Sheldon

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?

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