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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 23
HD
Overview:
Walternate asks Peter to help complete the device, while the fugitives Walter and Olivia are reunited with William Bell. Meanwhile, the alternate world’s Fringe Division closes in on the invaders, and Peter must make a life-shattering decision.