Mayim Bialik takes guest host reins on 'Jeopardy'

What is the next step for "Jeopardy?" After producers walked back the decision to name the show's executive producer to replace the late Alex Trebek, Mayim Bialik will serve as guest host of "Jeopardy" as producers restart the search for a permanent host. Bialik was originally announced last week by Sony Pictures Television to host primetime Jeopardy specials as executive producer Michael Richards was named the new host of the popular game show. But now Bialik — the former cast member of "Big…