Sara Gilbert by Kevin Terrell/WireImage.com Sara Gilbert by Kevin Terrell/WireImage.com

I totally called this one just the other day when it hit me that Johnny Galecki's nerd-tastic physicist on The Big Bang Theory, while in pursuit of Kaley Cuoco's blonde... um, non-physicist, would likely need to date a supergeeky gal along the way. Who better to fill that role than Sara Gilbert, who will reunite with her Roseanne hubby for an unspecified number of episodes when the CBS sitcom premieres Sept. 24. Gilbert will play a quantum-theory-spouting coworker of Galecki's, and the pair "attempt to date," says the Reporter.

One of my personal faves for the fall just got better. For much more on the new TV season, check out our gorgeous Fall Preview Guide.