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 (season 4) January start." The fourth season of "Breaking Bad" received universal acclaim from critics, garnering a 96 out of 100 on Metacritic. "The Boston Globe" referred to the show as a "taut exercise in withheld disaster" and declared the show "riveting". The "Pittsburgh Post-Gazette" labelled the series "smart and thought provoking that elevates the artistic achievements of the medium". Season four was listed by many critics as one of the best seasons of television in 2011. "Time" listed Walter White's "I am the one who knocks" line as one of the best television lines of 2011. "The Pittsburgh Post-Gazette" listed it