Bill Nye the Science Guy on the set of the Big Bang Theory.
The cast behind the scenes during a tape day.
Bill Prady, Simon Helberg, and Mike Massimino
So Bill just tweeted this. My guess is, its gonna be a good ep.
"Bill Prady, Chuck Lorre and I at Governors Ball. I love my other family" via her twitter
Bill Prady’s seat at the Emmy’s, via his twitter