The 56-year-old actor has played the science teacher turned meth kingpin on the AMC drama series for five seasons.
© AMC
He told Zap2it that he doesn't like to know what is in store for his troubled character because it affects his performance.
"I don't ask. I started to get the outlines back in season one, and then I realised that this journey that Walt is on is a switchback," Cranston explained.
"It didn't help me as an actor, because I would read two or three or four outlines down the road, and I would learn some information that could only discolour my performance in the episode I was currently shooting."
The new season of Breaking Bad airs Sundays on AMC in the US.
