Watch The Big Bang Theory Season 2 Episode 20: The Hofstadter Isotope Online

	IMDB Rating: 8.1/10 from 1,251 votes
	Release: 2009 / The Big Bang Theory / Season 2 / Episode 20
	Genre: Comedy
	Director: Mark Cendrowski
	Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco-Sweeting
	Synopsis: It's "Anything Can Happen Thursday", the third Thursday in the month the guys have deemed the day to do something different to get out of their rut. Sheldon proposes that they go to the comic book store (as comic book store night is usually Wednesday). Penny tags along to buy a gift for her nephew. In addition to getting something for her nephew, she also gets something else: picked up, specifically by Stuart, the comic book store owner. Leonard has mixed emotions: he is buoyed by the fact that someone that is somewhat like him at first glance can get a girl like Penny, but is jealous that Penny picked Stuart instead of him. To get over this situation, Leonard, with Howard and Raj, decides to do what Howard suggested to get them out of their funk: go to a bar to pick up desperate women.