WHICH is a real possibility here,
Breaking Bad Season 4, Episode 3
Which leads to...
The Big Bang Theory Season 3, Episode 14
Which one's X?
The Big Bang Theory Season 12, Episode 9
WHICH of these areas
do you think
The Big Bang Theory Season 7, Episode 21
...and an IQ WHICH can't be measured
by normal tests.
The Big Bang Theory Season 2, Episode 2