Breaking Bad

Skyler asks for a divorce and finds out where the money comes from. Walt wants out, but Gus lures him back with a superlab hidden under an industrial laundry, with chemist Gale as his assistant. The Salamanca cousins come up from Mexico to kill Walt, and Gus steers their revenge toward Hank, who survives the attack but can't walk. Jesse returns to the lab and crosses paths with Mike, Gus's right-hand man. When Jesse decides to take on two of Gus's dealers, Walt runs them over to save him. Gus grooms Gale to replace Walt. It ends with Walt, about to be killed by Mike, sending Jesse to kill Gale, and Jesse pulling the trigger.

1. Behind the scenesFly was born from a budget crunch

   The fly episode, directed by Rian Johnson, stays in the lab because the show was over budget. Moving the trucks to another location would have cost $25,000 to $35,000.

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2. Behind the scenesCranston behind the camera

   Bryan Cranston directed the season premiere, "No Más." It features the first credited appearance of his daughter, Taylor Dearden, as a high school student.

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3. ReferenceA drawing at the Santa Muerte shrine

   The Salamanca cousins, played by brothers Daniel and Luis Moncada, debut crawling to a Santa Muerte shrine, a Mexican folk devotion. There they leave a drawing of Heisenberg.

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