At the beginning of the season, when Walt is at the Denny's, he's shown taking his medication in the bathroom. In last night's episode, he's dressed similarly (presumably, he headed to the house after breakfast) and his collar looks to be caked in vomit. That seems to indicate he's still suffering from cancer.
There were two aspects of Cartel vs Gus. The first is the 20 year flashback, where Don Eladio killed Gus's partner (and possible lover) but not Gus, because "we know all about you" combined with hints of Gus being a general during the military dictatorship years of Chile (said in spanish during a phone convo with Salamanca). That has almost no blowback 20 years later though, the people involved must have moved on or died. Mike explains to Jesse in an earlier episode why Gus just walks around the sniper and why the Cartel won't kill him, but the rest of them are expendable - they want his massive distribution network which took 20 years to build up, its a perfect cover and far more profitable than anything the Cartel can put together in America. The terms for the Cartel were that they get 50% of all the money Gus makes AND he sends a chemist down to teach them how to make his better meth, but they will leave him in business. Gus manipulated everything to this end, since he wanted a meeting with all the bosses so he could assassinate them. A revenge plan that took 20 goddamn years to execute.
Also of note, in the Talking Bad discussion after the show, Vince Gilligan specifically mentions that in their discussions with various doctors while doing research for the show, he learned that when people go through chemo for a second time, they often do not loose their hair.
So, that theory that Walt takes different things from people he's killed?
I knew that about the distribution, but figured it would also have something to do with them knowing who Gus was initially. Didn't pick up on the Chilean general thing though, so that probably explains that.
First thing out of my buddies mouth at the very start was "Coughing? id his cancer back?", because he coughs when he walks into his house at the start, right before he see's the Heisenberg graffiti. At the time I went "I'm sure its just dusty or rank in there, looks like its been sealed up a while." but later in the episode I went "Well shit, I guess it is back."
No, not really. I think druggies are dumb, be it actual stoned people, or people portraying them on tv. It's just ignorant rambling. Every party ive ever been to has "that guy" and he's never been funny. Ever. "OMG DOODZ IM SO HIGH LISTEN TO THIS DUMB SHIT I JUS THOUGHT OF LIKE OMGAWDZ WOW ITS SO INTENSE BRO"
He's going through chemo again in present day (I guess past?). The drug he was probably taking is ondansetron (Zofran).
Also remember the first flash forward from episode one of season 5 - walt taking on skyler's characteristics (making bday age out of bacon) - may mean he killed skylar at some point
