'The Big Bang Theory' (CBS)

Expect to See: "We will go ahead and explore the relationship between Penny (Kaley Cuoco) and Leonard (Johnny Galecki)," producer Chuck Lorre says. "We are committed to going further in that relationship, and that ripples through the whole series. That will affect everyone, if one of them is in a real relationship." For sharp-eyed physicists: The equations on the white board do keep changing, as a professor of physics continues to work on problems. Related: Zap2it's Fall TV Preview Korbi TV's 'Big Bang' coverage
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