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18 Episodes 2008 - 2009
There are big changes in store for the little town of Eureka during season three. Frances Fisher joins to shake things up. Carter (Colin Ferguson) gets a house guest who shows up with a few surprises of her own. Zoe (Jordan Hinson) is growing up and beginning to spread her wings causing some father-daughter friction. Things really heat up this season with time loops, a new sun, mummies, a mayoral race and life is as interesting as ever.
Episode 1
Tue, Jul 29, 2008 60 mins
Season 3 kicks off with a hunt for an escaped drone while Samantha Thorne (Frances Fisher) arrives on the scene to oversee the clean-up of damages caused by Global Dynamics.
Episode 2
Tue, Aug 5, 2008 60 mins
A scientist somehow vanishes from a sealed biosphere, prompting Carter and Allison to investigate. Meanwhile, the "Fixer" attempts to make Eureka's efforts more profitable.
Episode 3
Tue, Aug 12, 2008 60 mins
The town's annual dog show segues into a canine malfunction; Zoe worries about the impact of the accelerated physics program on her life; earthquakes affect Allison's wedding plans.
Episode 4
Tue, Aug 19, 2008 60 mins
Events loop for Carter as he repeatedly experiences the same lousy day. Meanwhile, his free-spirited sister visits the town. Lexi: Ever Carradine.
Episode 5
Tue, Aug 26, 2008 60 mins
A search for a mummy ensues after a famed archaeologist opens the tomb of an Egyptian queen at Global Dynamics. Zac Santiago, Adrian Hough.
Episode 6
Tue, Sep 9, 2008 60 mins
The emergence of a superhero makes Carter's job more difficult; Thorne's subterranean search for a secret beneath Eureka imperils Zoe and her friends.
Episode 7
Tue, Sep 16, 2008 60 mins
The arrival of a second sun over Eureka upstages the town's mayoral race and forces Carter, Allison and Zane to investigate the fiery threat. Dean Marshall, Margot Berner.
Episode 8
Tue, Sep 23, 2008 60 mins
A scientific find produces sinister results and trust issues; Zoe's life is imperiled, and Eva Thorne knows the source of the predicament.
Episode 9
Fri, Jul 10, 2009 60 mins
Following his termination as sheriff, Carter interviews for a job with the Department of Homeland Security. Deputy Lupo resigns when she learns the new sheriff is a very personable robot.
Episode 10
Fri, Jul 17, 2009 60 mins
Carter takes a grueling recertification exam that tests him physically and psychologically; Allison pitches a town-wide DNA-monitoring security system to Henry that injures Deputy Lupo during the inaugural scan.
Episode 11
Fri, Jul 24, 2009 60 mins
Objects become ambulatory after Dr. Tess Fontana (Jamie Ray Newman) reopens Section 5, which may be the work of poltergeists.
Episode 12
Fri, Jul 31, 2009 60 mins
Long-term rivals from Area 51 visit Eureka for a bowling tournament; Carter probes an escalating series of pranks.
Episode 13
Fri, Aug 7, 2009 60 mins
A strange structure comprised of electronics and scrap metal is assembled in a field by Eureka's teenagers, who appear to have been manipulated while they were sleeping.
Episode 14
Fri, Aug 14, 2009 60 mins
Henry's ship returns, and Carter thinks it may be linked to the town's deadly electrical anomalies.
Episode 15
Fri, Aug 21, 2009 60 mins
Allison's baby shower yields eco-friendly gifts and the discovery of drowned scientists in an area where drowning is impossible. Billy Campbell.
Episode 16
Fri, Aug 28, 2009 60 mins
A sonic cleaning at Global Dynamics coincides with a phenomenon that causes Eureka's citizens to develop a communal form of Alzheimer's. Meanwhile, Allison goes into labor in the third-season finale.
Episode 17
Fri, Sep 11, 2009 60 mins
The arrival of an Arctic ice core causes the temperature to drop in Eureka on Dr. Tess Fontana's first day of managing Global Dynamics, and Taggart (Matt Frewer) resurfaces.
Episode 18
Fri, Sep 18, 2009 60 mins
In the third-season finale, Tess receives a job offer in Australia, Zoe is set to leave for Harvard, and Carter must contend with a magnetic disturbance that's floating above Eureka.