The citizens of Eureka attend the funeral of Susan Perkins, only to find out that she is in fact alive. Meanwhile the Sheriff moves into an underground bunker that is…

An accident leads a U.S. Marshal and a teenage girl (who later is revealed to be his daughter) to a peculiar town populated by scientists and their families where 10-year-old…

Nathan Stark and Jack Carter must put aside their rivalry to stop a deadly bacteria from destroying the town and killing Allison’s son. But can Carter ignore Stark’s crimes, as…

Beverly Barlow returns to town just as a parasitic bacterium threatens to destroy Eureka, by turning everything to gold and then into rust — people included.

Sudden muteness, human bioluminescence and faucets running blood cause many of Eureka’s citizens to believe that they are the victims of a biblical plague.

An abandoned research project on invisibility returns to haunt Eureka. Carter and Zoé become tangled in a web of strange occurrences that lead to Carter’s disappearance and the possibility that…

One of the Global Dynamics tanker trucks spills, potentially causing a change in everyone’s sleep habits… In the course of the episode, we come to learn that Global Dynamics has…

Dr. Whiticus creates an incredible “weather machine” intended to reverse the effects of global warming which instead stirs unexpected results.

Taggart’s theory is that solar flares caused by the eclipse, or the ‘Phoenix Effect’, are to blame when people start to spontaneously combust. When Carter discovers that a blast of…

It’s Allison and Stark’s wedding day and Carter finds himself reliving it over and over. Meanwhile, Carter’s sister, Lexi, visits the town.