Watch The Big Bang Theory Season 4 Episode 17 - The pain grillé Derivation Online Megavideo 

This program gets better and better. Its a classic!!!!

I watched this episode here:

----------> link

it has an awesome ending! If you want spoilers just ask me =)
i had the chance to watch the trailer at youtube a while back. and searched online and found the full episode finally (its the link i posted above). it was actually a pretty good episode. its definitely a must see.