Knowing nothing about the drug trade, he enlists the aid of his former student, Jesse Pinkman, to manufacture and, more importantly, sell his meth.
Walt's scientific knowledge and dedication to quality lead him to produce crystal meth of unrivaled purity.
After graduate school, he cofounded the company Gray Matter Technologies with his friend Elliott Schwartz and his then-girlfriend Gretchen.
Walt abruptly left the company and sold his financial interest for $5,000.
Gretchen and Elliot later married and made a fortune.
Walt resents Elliot and Gretchen for profiting from his work without crediting him.
While Walt was initially squeamish about the use of violence, he gradually came to see it as a necessity and eventually developed into a ruthless drug lord motivated largely by vanity, ego, and greed.
Not only does Walt become more sinister throughout the series, but he rises in power.
In Season 1, he and Jesse make thousands of dollars street dealing, but by Season 5, Walt is a millionaire drug lord that supplies crystal meth all across the South-West USA and as far as Eastern Europe.
Co-Founder, Gray Matter Technologies Chemist, Sandia Laboratories Chemistry Teacher, J. Wynne High School (former)Co-Owner, A1A Car Wash (former)Crystal Meth Manufacturer (former)Drug Kingpin (former)Bogdan Wolynetz - Former employer in the car wash Carmen Molina - Former employer in school Jesse Pinkman - Former meth cook partner and former student Elliott Schwartz - Former colleague Gretchen Schwartz - Former colleague and girlfriend Tuco Salamanca - Former employer in meth trade Saul Goodman - Former lawyer Gustavo Fring - Former employer in meth trade Gale Boetticher - Former meth cook assistant Mike Ehrmantraut - Former meth distributor Lydia Rodarte-Quayle - Former meth distributor Todd Alquist - Former meth cook assistant"You clearly don't know who you're talking to, so let me clue you in: I am not in danger, Skyler. A guy opens his door and gets shot, and you think that of me? He is the central character of the series, and is portrayed as a protagonist, antagonist and antihero.
" Walter "Walt" Hartwell White Sr., also known by his clandestine pseudonym "Heisenberg", was a chemist and a former chemistry teacher in Albuquerque, New Mexico, who, after being diagnosed with Stage 3A inoperable lung cancer, started manufacturing crystal methamphetamine to both pay for his treatments and provide for his family in the event of his passing.
As the series progresses, Walter gradually becomes darker and takes on a more villainous role.
Walt was once a promising chemist who, in graduate school, contributed research to a Nobel Prize-winning experiment.