FringeΣεζόν 4 Αντικατάσταση εικόναςΑριθμός επεισοδίου5NovationOverviewOlivia 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.Air dateNovember 4, 2011Runtime (min)43
