‘The Big Bang Theory’ season 6 spoilers: Is there a new promotion?

When you look at “The Big Bang Theory,” there have been a few alterations to the cast over the years. The first season, the show was really all about just five people — Jim Parsons, Johnny Galecki, Kaley Cuoco, Kunal Nayyar, and Simon Helberg. Then, Sara Gilbert was briefly promoted to a series regular during […]