Sara Gilbert in The Big Bang Theory by Justin Lubin/CBS Sara Gilbert in The Big Bang Theory by Justin Lubin/CBS

The geek squad groweth. Sara Gilbert, who guested a few times during The Big Bang Theory's inaugural season, has been bumped up to full-fledged series regular status for Season 2.

At last month's Comic-Con, series cocreator Chuck Lorre revealed that Gilbert would be back for "a bunch more episodes," but he must have since decided that nerdesse Leslie Winkle is truly needed in the mix - especially since it sounds like Leonard might still be on the market. (See this week's Mega Minute vodcast for more on that.)

Of course, Gilbert and Johnny Galecki (aka Leonard) previously played love interests on Roseanne.

The Big Bang Theory returns Sept. 22. - Matt Mitovich