Even though his cancer is in remission, chemistry teacher turned meth maker Walter White still can't catch a break. His wife has filed for divorce, his DEA agent brother-in-law is out to bust him, and a Mexican cartel just wants him dead. But with his family's future still at stake, Walt cooks up a deal that will make him a fortune, a scheme with a terrible price.

In season four, Walt and Skyler try to use gambling to explain how Walt has made all of his money; Skyler tries to launder money through a car wash; Hank's discovery of Gus Fring's fingerprint in Gale Boetticher's apartment is enough for DEA and Albuquerque PD to bring Gus in for an interview; and much more.