In which American TV series is there a serial killer known as Red John?

"The Mentalist" is an American drama television series that ran from September 23, 2008, until February 18, 2015, broadcasting 151 episodes over seven seasons, on CBS (Columbia Broadcasting System). Created by Bruno Heller, who was also its executive producer.

The series follows Patrick Jane, an independent consultant for the California Bureau of Investigation based in Sacramento, California. Although not an officer of the law, he uses his skills from his former career as a successful, yet admittedly fraudulent, psychic medium to help a team of CBI agents solve murders. The real reason for Jane's involvement with law enforcement is to track down the serial killer known as Red John, who was responsible for the brutal murders of his wife, Angela Ruskin Jane, and his daughter, Charlotte Anne Jane.