This article lists the major and recurring fictional characters on the science fiction television series, Fringe, created by J. J. Abrams, Alex Kurtzman, and Roberto Orci. In the overarching storyline for the five seasons of the show, several versions of the characters are introduced. Beginning in the second season, a parallel universe is revealed; many of the characters, portrayed by the same actors, exist simultaneously in the original and parallel realities. The fourth season is set in an alternate timeline, where original and parallel universes have evolved from different outcome at a certain point in their history, resulting in two more versions of the characters. These character profiles describe the characters as they appear in the original universe, with universe differences noted separately. Primary characters Olivia Dunham Olivia Dunham (portrayed by Anna Torv as an adult and Ada Berker and Karley Scott Collins as a young girl; main: season 1–5) is a young FBI agent assigned to a multi-agency task force of the U.S. Department of Homeland Security called the "Fringe division". She is brought aboard the Fringe division after her boyfriend and fellow agent, John Scott, dies in a Fringe-related case. As the series progresses she comes to learn that, as a child, she was a test subject for Walter's Cortexiphan trials, giving her some uneven psycho-kinetic abilities including the ability to cross between the universes. Over the course of the show Olivia develops a romantic relationship with Peter. The Other Universe version of Olivia Dunham, dubbed by the prime universe as Fauxlivia, is an agent of the alternate and more powerful Fringe division. As of the end of season 2, Fauxlivia is sent to the prime universe by Walternate, taking Olivia's place without the knowledge of the Bishops, and maintains a close relationship with Peter for unknown reasons; this ultimately puts stress on Olivia and Peter's own relationship. Eventually, she is brought back to the parallel world after completing her mission in the prime one. Fauxlivia has also been nicknamed, unofficially, Altivia, Alt-Olivia, Otherlivia, and Bolivia. In the episode "Immortality," Fauxlivia is revealed to be pregnant with Peter Bishop's child, which Walternate hopes to use to sway Peter back to the Other Universe. The alternate Olivia gives birth to a son in the episode "Bloodline". In the episode "6:02 AM EST" it is revealed that she has named the baby Henry. Walternate uses a sample of the baby's