Breaking Bad extremely playful on set, with Aaron Paul describing him as "a kid trapped in a man's body". Gilligan originally intended for Aaron Paul's character, Jesse Pinkman, to be killed at the end of "Breaking Bad"s first season in a botched drug deal as a plot device to plague Walter White with guilt. However, Gilligan said by the second episode of the season, he was so impressed with Paul's performance that "it became pretty clear early on that would be a huge, colossal mistake, to kill off Jesse". Donna Nelson, a professor of organic chemistry at the University of Oklahoma, checked
Breaking Bad trust in Walter and asks Gale to take over the lab. He orders his henchmen to kill Walter and Jesse, and Walt convinces them to let him call Jesse. Instead of luring Jesse to the lab to be killed as he had promised, Walt instructs Jesse to kill Gale so that Walt and Jesse will be Gus's only trained meth cooks, and Gus will have to keep them alive. On June 14, 2010, AMC announced "Breaking Bad" was renewed for a fourth, 13-episode season. Production began in January 2011, the season premiered on July 17, 2011, and concluded on October