 After a plea for scientific help from the show's creator, Vince Gilligan, Nelson volunteered to advise the show in regards to organic chemistry.Nelson checked scripts and provided dialogue for the show and also drew chemical structures and wrote chemical equations which were used as props.According to Gilligan, "[Because] Walter White was talking to his students, I was able to dumb down certain moments of description and dialogue in the early episodes which held me until we had some help from some honest-to-god chemists.