what do you mean by BCS being a ghost story?
Every major character introduced in BCS with the exception of Kim is doomed to die, and their deaths haunt the events of BrBa.
Chuck's final words to Jimmy and his suicide play a huge role in turning him into Saul (think of the flash-forward in 6x09 with Jimmy now living fully as Saul, mockingly echoing Chuck as he sits at his desk - "may justice be done, though the heavens fall"). If Jimmy never became Saul, Walt would have never been introduced to Gus, and none of the events of BrBa would have happened.
The curse of Nacho Varga leads to the annihilation of the cartel - without his sacrifice, Gus's schemes would have been found out and the cartel would have executed him and then continued on for who knows how long. But since Nacho takes all of the blame, Gus is able to evade detection, build his empire, and complete his quest for revenge in BrBa, wiping out the cartel for good. However, because Nacho put Hector in the wheelchair, it means that Gus doesn't get to survive for long after his triumph, since Hector kills Gus (and himself) with the bomb Walt gives him.
Lalo and Howard are buried under the superlab where Walt and Jesse work, putting them metaphorically and literally in the foundation of everything that happens in BrBa. Lalo and Howard, just like Chuck, play their roles in turning Jimmy to Saul, and haunt everything he does.
Even Gus and Mike are dead men walking, although their deaths don't occur to the BrBa timeline. Kim and Jimmy don't actually die, but the Kim and Jimmy we came to know and love do. They become ghosts of their former selves. This is a capital-T Tragedy. Everyone ends up a ghost in the end
snowghoul
germansingergirl
tangentwithtanner
titsay
