http://www.ew.com/article/2016/03/14/better-call-saul-postmortem-breaking-bad-villain-returns

“Vince,” he says of Vince Gilligan, "is a strange man with an incredibly complex mind, whether he wanted to bring me on or not, I had no idea. I was thrilled for multiple reasons: He’s a genius, I love working for him, his stuff is so aberrant in some ways.”