How the hell do I know who's the FRIEND
and who's the acquaintance?
The Big Bang Theory Season 3, Episode 13
Thank you, Sheldon.
You're a good FRIEND.
The Big Bang Theory Season 1, Episode 1
Thanks for coming, Sheldon.
You're a good FRIEND.
The Big Bang Theory Season 4, Episode 22
...maybe you could take your FRIEND out
for a nice thank-you dinner.
The Big Bang Theory Season 8, Episode 21
If we do get a new FRIEND,
he should be a guy you can trust.
The Big Bang Theory Season 2, Episode 4