Walter Hartwell White (also known by his clandestine alias Heisenberg) (played by Bryan Cranston) is an underachieving Albuquerque, New Mexico high school chemistry teacher who, after being diagnosed with lung cancer, starts manufacturing methamphetamine to provide for his family upon his death. Knowing nothing about the drug trade, he enlists the aid of his former student, Jesse Pinkman, to sell the meth he produces. Walt's scientific knowledge and dedication to quality lead him to produce crystal meth that is purer and more potent than any competitors'. To avoid the tedious collection of pseudoephedrine required for production, Walt devises an alternative chemical process utilizing methylamine, giving his product a distinctive blue color. His crystal meth, which is given the street name "Blue Sky," dominates the market, leading to confrontations with established drug makers and dealers.