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Season 1 - Sep. 09, 2008
Season 2 - Sep. 17, 2009
Season 3 - Sep. 23, 2010
Season 4 - Sep. 23, 2011
Season 5 - Sep. 28, 2012
Fringe Season 2 Episode 16
HD
Overview:
Walter explains to Olivia how Peter came from the alternate universe, and how he was willing to risk everything to save his son.