- Jack Brevins
- Corrupt Parole Officer assigned to Jarod who was using ex-cons to break into people’s houses. Parole
- Janice Gant
- Lieutenant in the Air Force; Special Projects Officer (SPO) observing the development of the Scimitar chip. Flyer
- Janice Vaughn
- Mother of Billee Dupree, was engaged to Eddie Fontenot, and left him for Marvin. Pool
- Jarod
- Jarod, the pretender, a child prodigy stolen from his parents when he was 4 years old, raised and exploited by the Centre all of his life. Now he has escaped, he searches for his family and the answers to the unanswered questions in his life as he tries to elude the Centre pursuit team. Isolated for the major part of his life from any cultural influences, Jarod is a unique blend of genius and child. Many common cultural references we all take for granted, he fails to understand and has a naivety that is slowly being stripped away from him.
- Javier Padilla
- Member of the Coast Guard involved with drug smuggling; partly responsible for the death of Tom King. Wracked by guilt, he helps Jarod to set things right. Every Picture Tells A Story
- Jax
- Restaurant owned by Faye, being sucked dry by Joey Melino. A Stand Up Guy
- Jefferson Heights
- Building condemned after the death of Michael Edwards, clearing the way for the developer Cynthia Sloan to construct Sloan Towers. Gigolo Jarod
- Jeffrey Edwards
- Agent driving the van that was killed in the kidnapping of Emma Barrett. Past Sim
- Jell-O
- It’s a dessert Jarod discovers. Collateral Damage
- Jell-O Brains
- Reference to Angelo. Bloodlines
- Jenkins
- Agent with ATF trying to track down missing teachers Flesh and Blood
- Jessica Kline
- DOJ agent on the Emma Barrett case. Past Sim
- Jimbo
- Orderly in Pleasant Woods Psychiatric Institute. Crazy
- Jimmy Radloff
- Friend that Bobby Bowman murdered, placing his headless corpse in Mr Bowman’s truck, framing him for the murder of his son. Jimmy ‘disappeared’ while hiking, never to be heard from again. Crash
- Jimmy Roemer
- Race driver injured in an accident that was meant for his older brother. Indy Show
- Joe Taylor
- One of the Arctic station workers who turned out to be working for the Centre to help cover up the Alpha Project. Qallupilluit
- Joellen
- Woman in Urban Search And Rescue being sexually harassed by a colleague. Over The Edge
- Joey Melino
- Mobster who killed an undercover cop, framed another for his murder. Involved in extortion, counterfeiting and murder. A Stand Up Guy
- Johhny
- Mobster in New York who helps Parker track Jarod to Vegas. His brother hacked into a Centre mainframe and is now serving ten years in prison. Curious Jarod
- Jordan Brock
- Reporter in Vietnam for Battle Zone who interviewed Prentiss Clements and Duc. Collateral Damage
- Jordan Lange
- Son of Dan Lange, cop that was murdered. Bulletproof
- Joshua Meyers
- Man posing as a reporter who kidnapped Bryce Banks. He himself was a kidnap victim, brainwashed into doing Father’s bidding. His actual name is Theodore Reed. End Game
- Joyce Cullman
- Woman unhappy in her marriage who hires Jarod as a gigolo. Gigolo Jarod
- JR
- Son of Deputy Miller. He has a congenital heart condition, but is saved when Jarod gives him Kyle’s heart after Lyle murdered him. Red Rock Jarod
- Jude
- Bank robbber, younger brother of Clavell. Bank
- Judith Peck
- Teacher at the Hayvenhurst school. Stolen
- Jumbo Jim
- Carnival equipment maker in Kentucky Jarod spent some time with, making mirrors, the shattered image, his specialty. Silence