The best minds in the US are tucked away in a remote town where they build futuristic inventions for the government's benefit.
Cast: Colin Ferguson, Salli Richardson-Whitfield, Erica Cerra, Joe Morton, Neil Grayston, Jordan Hinson, Chris Gauthier, Niall Matter, Ed Quinn
Wormholes randomly materialize around Eureka as the Department of Defense is set to shut the town down in the series finale.
The town's communications systems go haywire because the SmartDust control unit is broken. Meanwhile, the bio-printer vanishes; and Holly behaves strangely.
A malfunctioning experiment cuts Eureka off from the World and threatens to destroy all human life in town unless Carter can figure out who sabotaged the experiment and stop them before it's too late.
Jack and Allison's perfect honeymoon is interrupted when sabotage is discovered in Eureka. Elsewhere, Holly faces another hurdle to remain intact.
Dosed with a smart drug, Carter's genius gets out of control as he starts to re-write the laws of physics, putting his friends and the whole town in danger.
A submarine mishap ruins a romantic outing for Carter and Allison, and Jo must sort through pranks at Global Dynamics to save them.
Fargo is convinced that Holly is still inside of the Matrix computer, but the DOD is determined to wipe its hard drive clean -- losing Dr. Marten forever.
Henry conducts a preparedness drill that winds up a disaster; Fargo faces a hard reality.
The crew moves forward after an ordeal; Warren's visit adds to the pressure.
The Astraeus crew tries to overcome their Matrix Eureka experience; Fargo struggles with Holly's death; old animosities erupt as Parrish's latest project threatens to ignite the town.
The ship is found but the crew has been taken; help arrives by an unexpected and dangerous visitor.
Carter and Andy are jailed for trying to steal a piece of equipment to complete a device that Kevin has assembled to search for the Astraeus crew. Meanwhile, Holly comes up with a dangerous theory.
The Astraeus crew returns to Eureka four years later and must adapt to a myriad of changes, including a more oppressive version of Deputy Andy.