Through a series of bizarre circumstances, Jarod and Miss Parker find themselves trapped together on a strange island in a life and death situation, out of which come some of the most important revelations about their pasts.

Jarod reunites with two old friends and unleashes some powerful Centre revelations. Also Jarod and Miss Parker learn more about their pasts.

Facts become clearer concerning Ethan and Mr. Raines; Zoe is kidnapped.

The fourth-season finale has Jarod being contacted by his father, who tells him where to locate his sister.

After buying a camcorder at a pawn shop, Jarod tries to find the mother and daughter on the tape, which ends with them in peril.

While Jarod plays gang member, attempting to find a little girl's killer, Miss Parker tries to learn about a project concerning her late mother.

Jarod poses as a sixth-grade teacher to help a young murder witness; in another plotline, Miss Parker is reunited with a woman from her past.

Jarod poses as a drug addict to help a mother who was once addicted and is now in rehab, but doesn't understand how she got there.

Jarod poses as a Government agent in order to help a visually impaired Cambodian woman who accidentally encounters the colonel responsible for the killing of her family.

While Jarod poses as a member of a racist group, Angelo is convinced that someone from Jarod's past is out to kill him.

Jarod becomes a bodyguard for a gunworks owner and his fiancée, who's hiding a couple of secrets.

In the style of old detective movies, Jarod poses as a Las Vegas PI searching for a missing showgirl.

A crossover episode with "The Profiler" finds Rachel and Bailey working with Secret Service agent Jarod to solve the murder of the man who helped in his initial escape from the Centre.

Jarod gives Miss Parker information that may help her solve Thomas's murder; meanwhile, a killing at the Centre casts suspicion on Mr. Parker.

While FBI hostage negotiator Jarod deals with two brothers who have taken over a hospital, Miss Parker tries to help her father, who's in hiding.

Jarod poses as a psychiatrist, in order to try to learn the identity of a "wild child" found in the forest and the circumstances surrounding her ordeal.

Jarod investigates the events that left a bungee jumper in a coma; meanwhile, Miss Parker, Sydney and Broots follow a "Let's Make a Deal" series of clues.

While Jarod befriends a woman on the run, Miss Parker, Sydney and Broots embark on a movie-inspired expedition.

Jarod poses as a sex therapist, in order to try to find out the circumstances surrounding an attack on a female therapist.

Jarod poses as a San Francisco police detective, in order to try to find a teen who has disappeared; meanwhile, Miss Parker wonders about a Centre newcomer.

As Miss Parker and Mr. Lyle struggle to survive in a trap that he set for them, Jarod investigates a soldier's supposed suicide during isolation training.

Jarod is a prisoner of the Centre, but he escapes to try to save the lives of two researchers. Meanwhile, Miss Parker is recovering from being wounded.