List of Fringe characters
Anna Torv as Olivia Dunham, a Federal Bureau of Investigation (FBI) agent assigned to investigate the spread of unexplained phenomena.

Joshua Jackson as Peter Bishop, Walter's son who is brought in by Olivia to work with his father.

John Noble as Dr. Walter Bishop a former government researcher in the field of fringe science who was institutionalized after a lab accident.

Mark Valley as John Scott, Olivia's former FBI partner and lover.

Lance Reddick as Phillip Broyles, a Homeland Security agent who runs the Fringe Division.

Kirk Acevedo as Charlie Francis, Olivia's colleague and close friend at the FBI. He is second-in-command of the Fringe Division.

Blair Brown as Nina Sharp, a high ranking employee of Massive Dynamic, a leading firm in science and technology research.

Jasika Nicole as Astrid Farnsworth, a young federal agent and assistant to Olivia and Walter.