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S12 E5

The Big Bang Theory · Season 12, Episode 5

Leonard, Penny and others in “The Planetarium Collision”

What were you guys giggling about?

They were passing notes to each other.

Oh-ho, love notes?

If you love math.

And we do.

It's for our super-asymmetry theory.

Yeah, Amy and I have been having so much fun collaborating together.

Well, you know what they say, you never collaborate as much as your first year of marriage.

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