
So, Alex,
what's the TOPIC of your dissertation?
The Big Bang Theory Season 6, Episode 3

Not that my disinclination
to discuss the TOPIC...
The Big Bang Theory Season 4, Episode 7

If we're going to change the TOPIC
from jellyfish...
The Big Bang Theory Season 6, Episode 20

CASSEL: It's an old TOPIC,
really, when you think about it.
Westworld Season 3, Episode 8

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