5. Mike Ehrmantraut
With a CV that lists police officer, private investigator, hitman, consigliere, enforcer, and fixer as past roles, theres plenty of mileage in a character like Mike Ehrmantraut. Its great to see Gus Frings second in command playing more than a bit part in Better Call Saul as Gilligan and his created team shine the light on an earlier chapter of his life, but an existence as eventful as Mikes has many more stories to tell. A prequel exploring his formative years with Philadelphia law enforcement, building up to the events of harrowing Better Call Saul episode Five-O has potential, although it would be challenging to pull off since the shows would have to intersect with one another. Logistics aside, Mikes story almost mirrors that of Walt and Jimmy - its another tale of transformation where a catalyst sparks a dramatic shift from light to dark. There's a lot of potential scope here. The story could pick up as a young Mike earns his stripes as a Philly cop - who wouldn't love to see a young version of Jonathan Banks's badass curmudgeon in action? The most significant part of Mike's transformation was highlighted in Five-O, yet he broke bad long before. We're led to believe that he spent many years as a dirty cop - was there an event that pushed him onto the wrong side of the thin blue line? A Mike prequel could serve as a damning indictment of American law enforcement, shining the spotlight on its dirty underbelly, while spanning the length of the character's timeline and running into the events of Better Call Saul.