
So, what'd you get the BIRTHDAY boy?
The Big Bang Theory Season 1, Episode 16

You mention his BIRTHDAY and he vanishes?
The Big Bang Theory Season 9, Episode 17

That's why I said it was
the one on your BIRTHDAY.
The Big Bang Theory Season 12, Episode 6

Happy BIRTHDAY, dumbass!
The Big Bang Theory Season 9, Episode 17

Happy BIRTHDAY to you
The Big Bang Theory Season 9, Episode 17