Olivia and the others of Fringe division attempt to determine the origin of Peter Bishop, who purports himself as Walter's son who had died as a young boy in the original time line.
"Novation" is the fifth episode of the fourth season of the Fox science fiction drama television series Fringe, and the series' 70th episode overall. In the episode, the Fringe team of the alternate timeline deal with the ramifications of Peter Bishop's return.
