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

...there is a gentleman CALLER
bringing flowers to your fiancée as we speak.
The Big Bang Theory Season 8, Episode 7

You know what?
That's not a flag question, next CALLER.
The Big Bang Theory Season 9, 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

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