By the end of Season 4, Skyler White (Anna Gunn) is in an utterly thankless position. She knows about her husband’s criminal activities and has justified helping him launder his mountains of drug cash by convincing herself it’s for the good of her family. She’s enjoyed a brief affair, of sorts, with her boss, Ted Beneke — but then he clumsily tries to blackmail her and, at least in part because of Skyler, ends up dead. She has creative ambitions (she writes short stories, for example) but lacks the time, or perhaps the courage, to fully pursue them. Her sister is a kleptomaniac. But on top of all of this, her son Walter Jr. still worships his dad — often openly and callously rubbing his mom’s nose in the fact that, while she has struggled to keep the family together, her meth-cooking, drug-kingpin-murdering husband still enjoys pride of place in their son’s heart. Will there come a time when she has to — or when, out of anger or frustration, she simply decides to — tell Walt Jr. the full, shattering truth?
I think Hank is already fostering the idea that Walt it connected somewhere. I don't think the character is dumb enough to completely disregard all of Walt's strange behaviour, and if he has worked out that Walt is involved then I think he'll keep that to himself until he can fully connect all the dots. I'm awaiting the moment that Walt, or Skylar, or whoever, tells Hank that Walt's up to something to which he replies: ''I know''.