Season 3, Episode 20 6: 02 AM EST

First Aired: April 22, 2011

Walternate's thirst for revenge drives him to cause trouble in the other universe.

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  • Premiered: September 9, 2008
  • Rating: TV-14
  • User Rating:4.73 out of 5 (5,450 ratings)
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  • Premise: A drama with sci-fi elements following the FBI probe of mysterious deaths aboard an airplane that landed at Boston's Logan Airport. But the deaths aboard Flight 627 are only the beginning of the story. Executive producers include J.J. Abrams ('Lost') and h… (more)

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