Glee.

Twenty-Two: All or Nothing.

With Brittany, she was sitting in an office, seeing two men entering...

"Thanks for waiting, Miss Pierce." Donald said.

"Please, just call me Brittany." She said.

"Brittany. This is Dr. Leonard Halpman. I am Dr. Donald Langdon, the dean of the mathematics department here at MIT." Donald says.

"Brittany, when MIT heard about your near-perfect S.A.T. score, we were a little skeptical." Leonard tells her.

"A 0.2 grade point is practically unheard of." Donald said.

"It means you've never gotten higher than a D-minus." Leonard says.

"Is that why I had to take that math test this morning?" She asked.

"We needed to see for ourselves... if you were MIT material." Said Donald.

"And how did I do?" She asked.

"You scored a zero. Brittany, you lack a basic understanding of even the simplest arithmetic. I don't know why you couldn't have used a number-two pencil like we asked." Leonard muttered.

"However, we would like to ask you about these numbers that you scribbled on the back of your test." Donald tells her.

"Yeah, I don't know. I didn't know any of the answers on the test, so... I had all these numbers swirling around my head; I just decided to write them all down so my brain would stop feeling tickly." She tells them.

"Brittany, this is no ordinary series of numbers. When you start in the upper left-hand corner and read it from left to right, it's a prime number." Leonard says.

"Normally, you'd need a supercomputer to find a prime number that large." Said Donald.

"When you start from the upper right and read it from right to left, you get Avogadro's constant. That's not even the most amazing part. When you start in the lower left-hand corner and read the number counterclockwise you get Planck's constant, which is fundamental unit of measurement in quantum mechanics. We don't even know what it means." Said Leonard.

"We believe that what we are now calling the Brittany Code... will go down in history as the most important scientific breakthrough of the 21st century." Donald tells her.

"Oh, my God, that is... totally amazing. I thought you were gonna tell me I was an idiot. That's bullying I won't tolerate." She said.

"Brittany, it's possible that you may be the most brilliant scientific mind since Albert Einstein." Leonard says.

"That's why we here at MIT would like to present to you a very unusual proposition." Donald tells her.

In the choir room...

"All right, guys, it's finally here. Regionals." Will said.

Everyone cheered, clapping their hands.

"I just found out that, for safety concerns related to late-season tornadoes, Indianapolis had declined to host the competition. As defending champions were having regionals here in our auditorium." Will tells them.

Blaine slowly turned to look at Ashleigh.

"At least we've got home court advantage. Whoo!" Ashleigh shouted, cheering loudly and clapping her hands. "Let me guess that's not all. What is it, Mr. Schue?"