<P> For the next few months, Walt's meth production runs profitably and uninhibited, raking in millions of dollars . Elsewhere, Marie encourages Skyler to start repairing the family . Later, Skyler brings Walt to an enormous pile of money she has been collecting in a storage unit . After explaining to a stunned Walter that there is simply too much money to launder, Skyler pleads with him: "I want my kids back . I want my life back . Please tell me . How much is enough? How big does this pile have to be?" Later, Walt relents and informs her that he is "out". Later, Walt visits Jesse . Although Jesse is fearful of Walt, the two reminisce about the simpler days of cooking meth in the RV . When his visit is over, Walt leaves behind two bags . Fearing for his safety, Jesse unzips the bags slowly, only to find them filled with cash . Relieved, Jesse tosses a gun he had been concealing earlier . </P> <P> Walt Jr . (RJ Mitte) and Holly move back in with Walt and Skyler, and the family seems to be in repair . During a lunch by the pool with Hank and Marie, Hank leaves to use the bathroom . Rummaging for reading material, he finds Walt's copy of Walt Whitman's Leaves of Grass under some magazines in the bathroom, the same copy given to Walt by Gale Boetticher . As he thumbs through the pages of the book, Hank finds a handwritten dedication: "To my other favorite W.W. It's an honor working with you . Fondly, G.B." Hank then recalls an earlier conversation, in which Walt jokingly admitted to being the "W.W." found in a handwritten dedication in Gale's lab notebook . Hank becomes visibly shocked, implying that he has at last come to the realization that Walt is Heisenberg . </P> <P> This episode features several nods to earlier episodes, such as the fly at the beginning of the episode, the painting Walt stares at during the planning of the prison murders (the same painting from Season 2, Episode 3), the damaged paper towel dispenser (caused by Walt punching it in Season 2, Episode 9) in the restroom of Walt's cancer clinic, and Lydia's telling Walt "We're gonna make a lot of money together," reiterating Tuco's quote from the first season finale . Walt tells Lydia "Learn to take yes for an answer," which is exactly the same advice Mike gave him in the bar (Season 4, Episode 2). Series creator Vince Gilligan saw the ending somewhat as Gale's "poetic justice from beyond the grave ." </P> <P> It was estimated that the pile of money measured 6 ft × 3 ft × 2 ft and that Skyler would have not needed a storage unit until she had upwards of $10 million . In "Ozymandias," Walt tells Jack Welker that the buried pile equals $80 million; however, Gilligan expressed his doubts during an earlier podcast: </P>

What episode does hank figure out about walt