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"Over There" is the two-part second season finale of the Fox science fiction drama series Fringe. They are the 21st and 22nd episodes of the season, and the 42nd and 43rd episodes of the series overall. Both parts were written by Academy Award-winning screenwriter Akiva Goldsman, together with showrunners Jeff Pinkner and J. H. Wyman. Goldsman also served as director, his first such credit since the season premiere.
Fringe's premise is based on the idea of two parallel universes, our own and the Other Side, each of which contains historical idiosyncrasies. The two universes began to clash in 1985, after Dr. Walter Bishop (John Noble) stole the parallel universe version of his son, Peter, following his own son's death. The finale's narrative recounts what happens when Peter (Joshua Jackson) is taken back to the Other Side by his real father, dubbed "Walternate" (Noble). FBI agent Olivia Dunham (Anna Torv) and Walter lead a team of former Cortexiphan test subjects to retrieve him, after discovering that Peter is an unwitting part of Walternate's plans to bring about the destruction of our universe using an ancient doomsday device.