Chemistry teacher Walter White learns he has cancer and becomes a meth manufacturer.
Skyler White is Walter's wife, a mother of two and co-owner of A1A Car Wash.
Jesse Pinkman is a former student of Walt's and his meth-making partner.
Born with cerebral palsy, Walter White, Jr. is Walter and Skyler's teenage son.
Hank is Walter's macho brother-in-law. He is also a DEA agent.
Marie is Skyler's sister and the wife of DEA agent Hank Schrader.
Saul Goodman is Walt and Jesse's attorney. He's the quintessential shady lawyer.
The Head of Logistics at Madrigal Electromotive, Lydia was Gus Fring's methylamine supplier.
Todd is Walt's former lab assistant whose uncle's prison connections prove invaluable.
Mike worked for Gus and is Saul's go-to guy when his clients get in sticky situations.
Badger is one of Jesse's stoner friends and a street dealer.
Hector "Tio" Salamanca is a high-ranking Cartel member and Tuco's uncle.
Jane is Jesse's landlady and girlfriend and also a recovering drug addict.
Gus Fring is the owner of a fast food chicken restaurant and a major meth distributor.
Skinny Pete is one of Jesse's stoner friends and a street dealer.
The Cousins are cartel killers related to Tuco, who travel from Mexico to kill Walt.
Gale is the fastidious assistant Gus installs in Walt's superlab.
Gomez is Hank's DEA partner investigating Heisenberg's blue crystal.
Tuco is a meth distributor known for extreme violence.
Ted Beneke is Skyler's boss who also harbors romantic feelings for her.
Carmen is the assistant principal at J.P. Wynne High School, where Walt teaches chemistry.
Elliott Schwartz is Walt's grad-school colleague and Gretchen's husband.
Gretchen is the wife of Walt's grad school pal Elliott Schwartz and Walt's former lover.