<P> The episode received high critical acclaim, with critics praising the flashforward scene in the beginning, the ending scene and the performances from Bryan Cranston and Dean Norris . For his performance in the episode, Norris was called "Performer of the Week" by TVLine . </P> <P> In a flashforward, a 52 - year - old Walter White arrives at his abandoned and fenced off house, following the events of "Live Free or Die". Walt enters and sees "HEISENBERG" spray - painted on the living room wall . Observing the house's dilapidated state, which includes a group of teenagers using his emptied pool to skateboard, he retrieves the hidden vial of ricin from his bedroom . As he leaves he greets his former neighbor, Carol, who is shocked by his presence . </P> <P> In the present, Hank Schrader reels from finding Gale Boetticher's handwritten dedication found in Walt's copy of Leaves of Grass, finally realizing that Walt, his brother - in - law, was Heisenberg all along . After excusing himself and his wife Marie from the party at Walt's house, Hank swerves his car off the road on the way home while suffering a panic attack . Hank feigns an illness to work from home and takes the opportunity to review case files on Heisenberg and Gus Fring . Hank links people, events, and circumstances, as well as matching the handwriting in the Leaves of Grass dedication with that of the bullet points from Gale's lab notebook, to confirm that Walt is Heisenberg . </P> <P> Walt, who has left the meth business, and discusses ways to launder his drug money faster with his wife Skyler, with expansion of their car wash business as an aim . Lydia shows up at the car wash looking distressed and pleads for Walt to return, as the quality of the meth since his retirement has fallen below acceptable standards, jeopardizing their deal . However, Walt dismisses her and Skyler warns her never to come back . It is later revealed that Walt's cancer has returned, but he keeps this from his family and undergoes chemotherapy again . </P>

Which episode of breaking bad does hank find out about walt
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