Most days, casting announcements come thick and fast. At best, they are occasionally intriguing. At worst, they are like inevitable and unavoidable train wrecks that you simply can’t turn away from. Every once in a while, however, a casting announcement comes along that is so steeped in perfection, it emits its own glowing and radiant sunshine, in which we can all bask. On these rare and hallowed days, we can breathe a deep sigh of satisfaction and contentment – safe in the knowledge that somewhere, somehow, someone has our best interests at heart. Today is one of those days. Today is the day we learn that Michael McKean has joined the cast of Better Call Saul.