The Big Bang Theory: The Complete Fourth Season [Blu-ray] (2010) for $29.99

The superb sitcom The Big Bang Theory launches into its fourth season with an expanded cast and a whole new set of social dynamics to go with it. It's a little unsteady at first: Sheldon (the ever-inspired Jim Parsons) denies having a girlfriend in the similarly intellectual Amy Farrah Fowler (Mayim Bialik, a long way away from Blossom), which leads to several Sheldon-dominated episodes--and as marvelous a character as Sheldon is, he can be too much of a good thing.