On the right, you see David Saltzberg. He's a physicist at UCLA and the science consultant for the sitcom The Big Bang Theory. There are scientist characters on that show. Prof. Saltzberg makes sure that what they say actually makes sense. NPR reports:
Every week, Saltzberg attends the show's live taping at the Warner Bros. lot in Burbank, Calif. He makes sure the whiteboards are correct. For every new episode, they're covered by a fresh scrawl of formulas dreamed up by Saltzberg and admired by physicists for their scrupulous accuracy — and occasional shoutouts to what's happening in the world of science.
"The whiteboards have dozens of fans," Saltzberg jokes.
Saltzberg also reviews scripts in progress. They arrive with unfinished dialogue and brackets reading, "Insert Science Here." He fills in the blanks, as in an episode where Dr. Sheldon Cooper, a puffed-up theoretical physicist, keeps bumming rides from a neighbor.
Prof. Saltzberg also writes a blog devoted to the science of the show.