Overview: Phil Plait explores what it would take for a deadly alien visitation to happen on Earth.
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First Air Date: Aug 29, 2010Last Air date: Apr 19, 2011Season: 1 SeasonEpisode: 3 EpisodeRuntime: 48 minutesQuality: HDIMDb: 8.00 / 10 by 1 usersPopularity: 0.633Language: English