He almost burst into flames
like a VAMPIRE.
The Big Bang Theory Season 4, Episode 19
("BUFFY THE VAMPIRE PLAYER" THEME
PLAYING ON TV)
The Big Bang Theory Season 6, Episode 21
Mother, she's an atheist, not a VAMPIRE.
The Big Bang Theory Season 9, Episode 24
Is that Buffy the
Vampire Slayer?
The Big Bang Theory Season 12, Episode 23
...and the VAMPIRE bites a human...
The Big Bang Theory Season 6, Episode 9