Watch The Big Bang Theory Season 4 Episode 20 online via TV Fanatic with over 2 options to watch the The Big Bang Theory S4E20 full episode. Affiliates with free and paid streaming include Amazon and iTunes.
Amy: I should let you know that she asked for details about our dalliance. Sheldon: Interesting. So it went beyond the mere fact of coitus to a "blow by blow" as it were. Amy: Pun intended? Sheldon: I'm sorry. What pun?