The Big Bang Theory: The Complete Fourth Season

This season the Big Bang gangs romantic universe expands. On the rebound from Penny, Leonard falls into the arms of Rajs sister Priya. Sheldon gets a girlfriend, or rather a friend who is a girl: Amy, a dour neurobiologist who declares herself beasties with Penny. Howard and Bernadette heat up. And so do Raj and Bernadette (at least in Rajs Bollywood daydream). All in the furtherance of award-winning genius comedy.

Producer: Michael Collier
Actor: Kaley Cuoco-Sweeting
Actor: Jim Parsons
Actor: Johnny Galecki
Actor: Kaley Cuoco
Actor: Simon Helberg
Actor: Kunal Nayyar
Actor: Sara Gilbert
Actor: Mayim Bialik