[color=#000000
ost_uid0]An entire actual Doctor Who scene is devoted to pi and pie!
[The Master crosses a checkerboard deathtrap unharmed.]
[b
ost_uid0]Master[/b
ost_uid0]: Try it, Doctor, it's as easy as [i
ost_uid0]pi[/i
ost_uid0]. [Exits]
[b
ost_uid0]Doctor[/b
ost_uid0]: What an extraordinary fellow. "As easy as pie"? "As easy as pie"?
[b
ost_uid0]Tegan[/b
ost_uid0]: That's what he said.
[b
ost_uid0]Doctor[/b
ost_uid0]: No, he didn't! He said "As easy as pi," the Greek letter pi! Surely you know some basic mathematics, child?
[b
ost_uid0]Tegan[/b
ost_uid0]: Course! The ratio of the circumferance of a circle ... to its diameter ... is expressed by the Greek letter pi, right?
[b
ost_uid0]Doctor[/b
ost_uid0]: Correct. You find the safe route across the board by using the mathematical formula pi. Oh, but the application, the application ... Let me see now. 3.14159265 -- yes! [He walks across the board unharmed, then gestures to Tegan] Now!
[b
ost_uid0]Tegan[/b
ost_uid0]: I sure hope you've got your sums right.
... I didn't say it wasn't a silly one.
(From "The Five Doctors")[/color
ost_uid0]