In Metástasis, Diego Trujillo (center) plays Walter Blanco, a chemistry teacher who sells crystal meth with his former student José Miguel Rosas, played by Roberto Urbina. Manuel Rodriguez/UniMás hide caption

itoggle caption Manuel Rodriguez/UniMás

How could you not feel sorry for this guy? Vince Gilligan even admitted that he loaded up the Breaking Bad pilot with "reasons to give a damn about" Walter White. Doug Hyun/Courtesy of AMC hide caption

itoggle caption Doug Hyun/Courtesy of AMC