Peter Bishop is the grown-up son of "Walternate," the Walter Bishop from the Other Side. When Walternate tried to enlist Peter in his plot to destroy Walter's world, Peter instead used Walternate's Machine to create a bridge between the two sides — and vanished from reality. Not even Olivia Dunham, the woman he loved, remembered him. Peter was known only as the child who died moments after Walter stole him from his world.

But the mysterious future scientists called the Observers determined that traces of Peter remained. When they ordered their colleague September to erase Peter permanently, he couldn't do it, and eventually Peter returned in the flesh. Still no one knew him, and Peter found many other details were different too. Though convinced he was in the wrong place, he joined Olivia and the Fringe team to fight an old enemy only he remembered: David Robert Jones, who was helping Walter's former partner, William Bell, destroy both universes.

With Olivia's help, Peter killed Jones. Then he turned off the Machine to break the link between worlds and stop Bell. Walter feared Peter would vanish when the universes separated, but he stayed right where he belonged.

Now Peter looks forward to the child he's expecting with Olivia. But with a new threat looming, the future may not be as bright as they hope.

Joshua Jackson has been working in front of the camera for almost 20 years. He recently filmed "Inescapable," and this summer, he stars opposite Rebecca Hall, Bruce Willis and Catherine Zeta-Jones in the independent feature film, "Lay the Favorite," from director Stephen Frears.

Jackson's feature film debut was in Michael Bortman's "Crooked Hearts." He has since appeared in the "Mighty Ducks" trilogy, "Cursed," "Gossip," "Apt Pupil," "Cruel Intentions," "Digger," "Andre," "Aurora Borealis," "Bobby," "Shutter" and "The Skulls," as well as in Rose Troche's critically acclaimed "The Safety of Objects" and the film version of Moises Kaufman's groundbreaking play, "The Laramie Project." For his work in the Canadian feature film, "One Week," Jackson received the 2010 Genie Award for Best Actor. He has also made cameo appearances in Steven Soderbergh's "Ocean's 11," "Scream 2," "Urban Legend" and "I Love Your Work." Jackson portrayed the fast-talking, self-deprecating "Pacey Witter" on "Dawson's Creek" for the popular series' six-season run.

Additionally, Jackson enjoyed a successful run on London's West End, starring in "A Life in the Theatre," alongside Patrick Stewart. The acclaimed comedy was written by the Academy Award-nominated and Pulitzer Prize- and Olivier Award-winning David Mamet.

A Vancouver native, Jackson divides his time between his hometown and Los Angeles.