"Jeopardy!" will briefly expand Mayim Bialik’s role as it looks for a new permanent host in the wake of Mike Richards’ stepping down last week. In a statement provided to Fox News, Sony Pictures Television confirmed the former "Big Bang Theory" actress will fill in as the host of the show for its regular syndicated programming this week now that Richards is out. Bialik will tape three weeks of episodes this week ahead of the show announcing yet another round of guest hosts that will buy the