DVD The Big Bang Theory: The Complete Fourth Season

In the fourth season of this hit sitcom, socially awkward physicists Leonard (Johnny Galecki) and Sheldon (Jim Parsons) remain comparatively clueless when it comes to women, although Leonard seems to be hitting his stride with beguiling girl-next-door Penny (Kaley Cuoco). Fellow brainiacs Howard (Simon Helberg) and Raj (Kunal Nayyar), however, are still hopelessly consumed with data instead of dating.