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Supernatural: Season 4

4x21 When the Levee Breaks

  • Aired2009-05-08T02:00:00+01:00
  • NetworkThe CW
  • CountryUnited States
  • LanguageEnglish
  • Runtime42 minutes
  • Certification

Dean and Bobby have something frightening locked in Bobby's panic room: Sam, contaminated by demon blood. But as the apocalypse draws nearer, Bobby wants to free Sam to battle on their side.