
Look, let's not get off TOPIC.
Bernadette, I need to apologize.
The Big Bang Theory Season 3, Episode 10

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

Have you noticed Howard can take any TOPIC
and use it to remind you he went to space?
The Big Bang Theory Season 6, Episode 5

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

New TOPIC, please.
The Big Bang Theory Season 2, Episode 19