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.
Mike worked for Gus and is Saul's go-to guy when his clients get in sticky situations.
Gus Fring is the owner of a fast food chicken restaurant and a major meth distributor.
Gomez is Hank's DEA partner investigating Heisenberg's blue crystal.
Tuco is a meth distributor known for extreme violence.
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.
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.
Ted Beneke is Skyler's boss who also harbors romantic feelings for her.
Jane is Jesse's landlady and girlfriend and also a recovering drug addict.
Gale is the fastidious assistant Gus installs in Walt's superlab.
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.