"The Gates Excitation"

On The Big Bang Theory Season 11 Episode 18, Sheldon thinks he is the victim of an April Fools prank, and Penny gets the opportunity to host Bill Gates at work.

"The Athenaeum Allocation"

On The Big Bang Theory Season 11 Episode 17, Bernadette and Wolowitz must decide who should stay at home with the kids, while Leonard looks for a wedding venue.

"The Neonatal Nomenclature"

On The Big Bang Theory Season 11 Episode 16, when Bernadette won't go into labor, all her friends try different tactics to get things started.

"The Novelization Correlation"

On The Big Bang Theory Season 11 Episode 15, Sheldon petitions Wil Wheaton to appear on the new Professor Proton show, but Wil offers a role to Amy instead.

"The Separation Triangulation"

On The Big Bang Theory Season 11 Episode 14, when Sheldon rents his old room back for a quiet place to work, he drives Leonard crazy when he is a model tenant.

"The Solo Oscillation"

On The Big Bang Theory Season 11 Episode 13, Amy and Leonard bond during a series of science experiments after Sheldon kicks Amy out so he can work solo.

"The Matrimonial Metric"

On The Big Bang Theory Season 11 Episode 12, Sheldon and Amy devise secret experiments to discover who is most qualified to be best man and maid of honor.

"The Celebration Reverberation"

On The Big Bang Theory Season 11 Episode 11, Sheldon and Wolowitz plan birthday parties for Amy and Halley. Leonard spirals about his lack of accomplishments.

"The Confidence Erosion"

On The Big Bang Theory Season 11 Episode 10, Sheldon and Amy try to eliminate their stress from planning the wedding by applying math to the process.

"The Bitcoin Entanglement"

On The Big Bang Theory Season 11 Episode 9, Sheldon wants to teach the guys a lesson after they cut him out of a potentially lucrative Bitcoin investment.

TBBT Quotes

Oh, Bernadette, please play my clarinet.

Raj's poem

Sheldon: I'll have a diet Coke.
Penny: Can you please order a cocktail? I need to practice mixing drinks.
Sheldon: Fine... I'll have a virgin Cuba Libre.
Penny: That's... rum and Coke without the rum.
Sheldon: Yes, and would you make it diet?