Walter White is a high school chemistry teacher who learns that he has lung cancer. With a new lease of life, Walter sets up a mobile meth lab with a former student and becomes a drug dealer in order to secure his family's financial security.
Following their debacle in the desert, Walter and Jesse are left with a mess to dispose of. Later, Skyler grows suspicious of Walt's recent activity.
Following an argument with Jesse, Walter is left to deal with Krazy-8 alone. After Marie raises concerns that Walt Jr is smoking cannabis, Hank shows him the dangers of drug use.
The DEA become suspicious of a new drug kingpin. Walt reveals that he has cancer to Marie and Hank. Elsewhere, Jesse visits his estranged family.
Walter and Skyler attend a former colleague's party, Jesse tries to free himself from the drugs, and Skyler organises an intervention for Walt.
The side-effects of chemotherapy begin to plague Walt, who is also cooking meth again, and Jesse's friend, Skinny Pete, introduces him to a distributor named Tuco, but things go awry and Jesse ends up hospitalised.
Bryan Cranston
Walter White
Aaron Paul
Jesse Pinkman
Anna Gunn
Skyler White
Betsy Brandt
Marie Schrader
RJ Mitte
Walter White Jr.