'Medium' meets 'Night of the Living Dead'

"Medium's" move to CBS has given the show a sense of certainty it didn't have in the past couple seasons at NBC -- which is why you'll see Patricia Arquette fighting off zombies this fall.

Why is CBS excited about having NBC castoff "Medium" on its Friday-night schedule for next season? Let the network explain.

More than any other network, CBS is playing from a position of strength going into next season, and its fairly stable schedule for 2009-10 reflects that.