Who said anything about it needing blood? The episode was just more or less all filler, nothing more. The only thing that we got out of it is that they got the Car Wash and that Hank ended up getting Gale's lab notes because of his wife's kleptonmania. I mean it was a good episode, it wasn't bad by any means, but minus those two things we already knew everything else going on. The writing and acting were great, there was some really funny moments, I think it had some of the best cinematography so far this season but overall it was a filler episode and there really is no denying that. Like I said this show hardly ever has them, but this was one of them.
Saul/Walt/Skyler brainstorming scene and Jesse asking Walt if he wants to go go-karting with him were funny as fuck though.