Season 6, Episode 6: "The Gymnast"

-What stone? -A kidney stone.

What is that, anyway?

It's a stony mineral concretion...

...formed abnormally in the kidney.

And this jagged shard of calcium pushes its way through the ureter...

...into the bladder. It's forced out through the urine.

Boy, that's gotta hurt.

Our shareholders have given basic approval...