|Portrayed by||Christopher Cousins|
|First appearance||There Will Be Blood|
|Last appearance||Behind The Red Curtain|
|Profession|| Trustee at Women's shelter|
Jason Lennon is a character that appeared on the episode There Will Be Blood in The Mentalist. He's one of Red John's accomplices, a serial rapist and killer of five women, and helped Red John in the murder of Miranda Martins.
Lennon was first introduced in "There Will be Blood". He was introduced as a trustee at a woman's shelter who assisted Red John in the murder of Miranda Martins.
Red John had Julia Howard give Miranda Martins to Lennon so that Lennon could give her to Red John. Lennon was a trustee at a Woman's shelter. After excessive torture by Lorelei Martins, he revealed, succesfully, his friendship to Red John to Patrick Jane and his role in Lorelei's sister's death. According to Jane he binds his victims with fishing line and proceeds to rape and kill them. He was shot by Lorelei and remains in a coma. As of the 16th episode of the 5th season, Jason Lennon is the only known Red John accomplice who is still alive. He's under surveillance of DHS by Robert Kirkland. In Behind The Red Curtain, the 18th episode of the 5th season, Lennon was killed by Robert Kirkland who injected him with a syringe containing air that caused air embolus that made his heart give out. In Green Thumb, his name was seen on a fake list of Blake Association members.