Esposito breaks new ground as a ‘Breaking Bad’ foe (AP)

In this publicity image released by AMC, from left, Aaron Paul, Jonathan Banks, Bryan Cranston and Giancarlo Esposito are shown in a scene from the premiere episode of Season 4 of  'Breaking Bad,' premiering Sunday at 10 p.m. EDT on AMC.  (AP Photo/AMC, Ursula Coyote)AP – Walter White has lived a hectic life since learning he has terminal lung cancer, then deciding to apply his skills as a high school chemistry teacher to cook and sell methamphetamine so that, after he’s gone, his family will be provided for.