
Oh, yeah. Those guys can be
very stubborn. What's the TOPIC?
The Big Bang Theory Season 2, Episode 20

Very controversial TOPIC.
The Big Bang Theory Season 5, Episode 3

...to introduce
an alternate TOPIC of conversation.
The Big Bang Theory Season 4, Episode 7

I'm smart enough. Asking me about a TOPIC
I'm not familiar with doesn't prove anything.
The Big Bang Theory Season 8, Episode 2

I would like to propose a salon TOPIC.
The Big Bang Theory Season 8, Episode 18