Originally Posted by gort
I've been rewatching breaking bad as I got the fiancée into it. We never did officially find out who warned Hank about the brothers coming to kill him did we?
I have a vague memory of this being discussed in the podcast or possibly on the commentary DVD's. I don't think the actual person really matters (if it's a call by Mike or someone else), it's pretty clear Fring orchestrated it.