Walter Hartwell "Walt" White Sr., also known by his clandestine pseudonym and business moniker Heisenberg, is a character from breaking bad series. As BB wiki says: Walter is a chemist and retired drug kingpin from Albuquerque, New Mexico. Walt is a former high school chemistry teacher at J. P. Wynne High School who, after being diagnosed with terminal lung cancer in 2008, started manufacturing chemically pure crystal methamphetamine with his former student, Jesse Pinkman. His initial plan was to earn enough money to provide for his family (his wife Skyler, son Walt Jr., and infant daughter Holly) after his death, but later became almost completely consumed by his drug empire.