This is an interesting TOPIC.
The Big Bang Theory Season 4, Episode 1
Very controversial TOPIC.
The Big Bang Theory Season 5, Episode 3
CASSEL: It's an old TOPIC,
really, when you think about it.
Westworld Season 3, Episode 8
Oh, my, that's an uncomfortable TOPIC.
The Big Bang Theory Season 6, Episode 23
Okay, the first question
is on the TOPIC of optics.
The Big Bang Theory Season 1, Episode 13