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Season 1 - Sep. 25, 2006
Season 2 - Sep. 24, 2007
Season 3 - Sep. 22, 2008
Season 4 - Sep. 21, 2009
Heroes Season 4 Episode 16
HD
Overview:
“Pass/Fail” is the fifteenth episode of the fourth season of the NBC science fiction drama series Heroes, and the seventy-fourth episode overall. The episode aired on January 18, 2010.