Air Date: Sep 19, 2011

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In the Season 4 finale, Carter and Jo respond to a mysterious attack on the presidential convoy; good-byes are exchanged before the Astraeus Read More

In the Season 4 finale, Carter and Jo respond to a mysterious attack on the presidential convoy; good-byes are exchanged before the Astraeus mission is launched; and cosmic anomalies threaten Eureka. Read Less