The Big Bang Theory2007

[first lines]

Penny:
Ah, I always tear up when the Grinch's heart grows three sizes.

Sheldon Cooper:
Tears seem appropriate. Enlargement of the heart muscle, or hypertrophic cardiomyopathy, is a serious disease which could lead to congestive heart failure.

Leonard Hofstadter:
[to Deck the Halls] Fa-la-la, la-la-la, la-la-la.

Penny:
You really didn't like it, Sheldon?

Sheldon Cooper:
No, on the contrary. I found the Grinch to be a relatable, engaging character. And I was really with him right up to the point that he succumbed to social convention and returned the presents and saved Christmas. What a buzzkill that was.

Leonard Hofstadter:
When we watch Frosty the Snowman, he roots for the sun.

Sheldon Cooper:
Excuse me, but the sun is essential for all life on Earth. Frosty is merely a bit of frozen supernatural ephemera in a stolen hat. A crime, by the way, for which he is never brought to account.

Leonard Hofstadter:
Fa-la-la-la-la, la-la, la-la!