Charles "Chuck" McGill, Jr. is Jimmy McGill's older brother. He is a named partner at one of Albuquerque's most prestigious law firms, Hamlin, Hamlin & McGill, which he co-founded along with his business partner, Howard Hamlin. A brilliant man who holds himself and others to high ideals, Chuck firmly believes that doing the right thing is the only true path to success. Chuck suffers from electromagnetic hypersensitivity, an unusual affliction garnered under mysterious circumstances, which makes it challenging for him to lead a normal life.