Charles "Chuck" McGill, Jr. is the the hidden main antagonist in the AMC comedy/drama series Better Call Saul. He is a big shot lawyer and older brother of James "Jimmy" McGill, aka, Saul Goodman. He is portrayed by Michael McKean.
Better Call Saul season 1
Charles "Chuck" McGill is a big shot lawyer working for the Albuquerque based law firm Hamlin Hamlin & McGill (HHM). Sometime in the eighties, he goes to his hometown in Cicero, Illinois, to bail out his little brother, James "Jimmy" McGill, who is a small time scam artist. Facing with charge of being a sex offender for defecating through a sunroof on a car with two kids, Jimmy convinces Chuck to help in exchange for shaping up. Chuck reluctantly agrees on one condition; that Jimmy gives up his life as a scammer and move to Albuquerque with Chuck and work as a mail room boy at his law firm. Jimmy agrees and leaves Illinois.
In Albuquerque, Jimmy straightens up and lives a better life. He also wants to become a lawyer just like Chuck. After taking an online class and passing the bar exam, Jimmy is a certified lawyer and tells his brother. Although Chuck seems proud of Jimmy, he secretly despises Jimmy for becoming a lawyer as he thinks that he isn't a real one because he took the easy way and that he still thinks he sticks to his criminal past. In order to keep Jimmy from working with him at his law firm, Chuck has his partner, Howard Hamlin, tell Jimmy that there is no position.
After a while, Chuck begins to suffer from electromagnetic hypersensitivity and can't stand anything electrical. He has his entire home stripped of anything that conducts electricity and lives his life as a semi-recluse and works from his house and have Jimmy meet his needs. He even had wife who had gone for undisclosed reasons.
When Jimmy finds a case in which a nursing home is scamming old people by taking their money, Jimmy takes his case to Chuck and have him take the case to HHM. Chuck, at this point, is starting to shrug off most of his condition and starts getting out of the house more. One night, while Jimmy is asleep, Chuck uses Jimmy's cell phone to call Howard and tell Jimmy not to hire him. The next day, Jimmy finds his phone's battery drained and he and Chuck go back to HHM. The whole law firm welcomes back Chuck and they present the case. Howard will take the case, but will not hire Jimmy in exchange for $50,000. Jimmy angrily storms out the law firm. Later that night, Jimmy calls his phone company about his cell phone and learns that there was a deleted call with Howard Hamlin's number in it.
Knowing that it was Chuck all along who kept him from joining the firm, Jimmy confronts him and asks why he was working against him. Chuck says that Jimmy isn't a real lawyer because he didn't commit his life to being a lawyer and took a bunch of shortcuts. He also says that he hasn't changed his criminal ways. Feeling betrayed and broken hearted, Jimmy tells Chuck that he is done with him and leaves for good.
After the death of his friend Marco after an old time's sake of conning people, Jimmy gives up being a lawyer, but returns to work after taking up an offer from another local firm called Davis & Main (DM). Howard hears Jimmy's promotion and goes to tell Chuck. Chuck is shocked to hear that Jimmy has been accepted and heads to one of DM's meetings with HHM to see for himself. Seeing Chuck's appearance intimidates Jimmy at first, but his girlfriend and law partner Kim Wexler reassures him that everything is alright.
Meanwhile, Jimmy runs a commercial for DM without his boss' consent. Seeing the commercial angers Jimmy's boss and attempts to fire him, but instead gives him a second chance.