First the good news: Big Bang Theory star Kaley Cuoco is expected to make a full recovery in the wake of a weekend horseback-riding accident that left her with a fractured leg.
Now the bad news: It looks like the CBS hitcom will be Penny-less for more than one episode.
Although a Warner Bros. spokesperson declined to comment, a Big Bang source confirms that Cuoco—who remains hospitalized in Los Angeles—is now expected to miss “a few” episodes; initial reports had her missing just a single episode.
<snip>
The source points out that Big Bang‘s air schedule will not be impacted by the disruption, which comes as the series is making a high-profile move to Thursday nights. Judging by how well Sheldon & Co. performed in repeats last night, industry analysts (read: me) expect next week’s fourth-season premiere to trounce the competition.

More:
http://ausiellofiles.ew.com/2010/09/17/big-bang-theory-kaley-cuoco-accident/