Eureka Season 4 Episode 4 (Eureka s04e04) with title “The Story of O2″ airs on Friday, July 30th 2010 at 09:00 pm via Syfy Network.
Here is summary for Eureka Season 4 Episode 4 :

Eureka’s Space Week Festival causes mayhem for Allison, who is also trying to relate to her son. Meanwhile, Carter hopes the Zoe he is set to visit at Harvard is the daughter he remembers.

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