...to introduce
an alternate TOPIC of conversation.
The Big Bang Theory Season 4, Episode 7
And on a different
but not unrelated TOPIC...
The Big Bang Theory Season 3, Episode 1
CASSEL: It's an old TOPIC,
really, when you think about it.
Westworld Season 3, Episode 8
New TOPIC, please.
The Big Bang Theory Season 2, Episode 19
Oh, my, that's an uncomfortable TOPIC.
The Big Bang Theory Season 6, Episode 23