"The Meteorite Manifestation"

On The Big Bang Theory Season 12 Episode 14, Leonard is disappointed when he's excluded from a project and Bernadette and Wolowitz may be breaking the law.

"The Confirmation Polarization"

On The Big Bang Theory Season 12 Episode 13, Sheldon and Amy's super asymmetry theory is proven by two physicists who try to kick Amy off the Nobel nomination.

"The Propagation Proposition"

On The Big Bang Theory Season 12 Episode 12, Koothrappali tries to mend things with his ex-fiancée, Anu and Penny's ex-boyfriend, Zack, asks for Leonard's help.

"The Paintball Scattering"

On The Big Bang Theory Season 12 Episode 11, Penny and Leonard organize a paintball game that results in mayhem while Sheldon is jealous of Amy.

"The VCR Illumination"

On The Big Bang Theory Season 12 Episode 10, Bernadette helps Wolowitz ace his Magic Castle audition and Sheldon finds a VHS tape from his past.

"The Citation Negation"

On The Big Bang Theory Season 12 Episode 9, Sheldon and Amy are devastated after learning that Super-Asymmetry has already been discovered and disproven.

"The Consummation Deviation"

On The Big Bang Theory Season 12 Episode 8, when Wolowitz lures Mr. Fowler away with magic tricks, Sheldon has no choice but to bond Amy's mother.

"The Grant Allocation Derivation"

On The Big Bang Theory Season 12 Episode 7, Bernadette turns the backyard playhouse into aher own hideaway, while Leonard distributes extra grant money.

"The Imitation Perturbation"

On The Big Bang Theory Season 12 Episode 6, Sheldon seeks retaliation at Leonard and Penny's Halloween party when Wolowitz dresses to look like him.

"The Planetarium Collision"

On The Big Bang Theory Season 12 Episode 5, Sheldon wants to ensure Amy is available to work with him and accidentally sabotages her career in the process.

TBBT Quotes

It's very simple. Scissors cuts paper, paper covers rock, rock crushes lizard, lizard poisons Spock, Spock smashes scissors, scissors decapitates lizard, lizard eats paper, paper disproves Spock, Spock vaporizes rock, and, as it always has, rock crushes scissors

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?