Laurie Metcalf

CBS Broadcasting Inc.

Is this a good idea? CBS plans a "Big Bang Theory" spin-off for the fall TV season called "Young Sheldon," about Sheldon Cooper at age 9.

"Big Bang" creator Chuck Lorre and producer Steve Molaro are creating the sitcom starring Iain Armitage (HBO's "Big Little Lies") as little Sheldon living in east Texas with his family and "going to high school," CBS says.