
...suggesting that he has
no personal relationship with the CALLER.
The Big Bang Theory Season 2, Episode 15

Thanks, CALLER. You know the movie
actually has a little bit of a cult following?
The Big Bang Theory Season 8, Episode 20

Need the location of an incoming CALLER.
Breaking Bad Season 5, Episode 14

Unknown CALLER.
It's got to be them.
The Big Bang Theory Season 12, Episode 23

It's time for a very special guest CALLER.
The Big Bang Theory Season 8, Episode 20