It's the CIRCLE of life, sweetie.
The Big Bang Theory Season 4, Episode 23
...on the NSF expedition
to 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
Circle, CIRCLE, dot, dot,
now you have a cootie shot.
The Big Bang Theory Season 2, Episode 10
And if it passes
outside the CIRCLE, like this...
Vikings Season 1, Episode 1