
...on the NSF expedition
to the Arctic Circle.
The Big Bang Theory Season 2, Episode 23

You know, last time, I was able to book
a cruise to the Arctic to see a solar eclipse.
The Big Bang Theory Season 1, Episode 5

...in extreme temperatures
such as we will face in the Arctic Circle.
The Big Bang Theory Season 2, Episode 23

I'm going to the Arctic Circle with
Leonard, Wolowitz and Koothrappali.
The Big Bang Theory Season 3, Episode 1

...but to elaborate,
I am going to the Arctic Circle...
The Big Bang Theory Season 2, Episode 23