Seasons & Episodes
Pilot
An accident leads a U.S. Marshal and a teenage girl to a peculiar town populated by scientists and their families where
Many Happy Returns
The citizens of Eureka attend the funeral of Susan Perkins, only to find out that she is in fact alive. Meanwhile the Sh
Before I Forget
Something starts to steal the townspeople's memory...
Alienated
After hosting a movie party, Spencer is found the next day in the middle of a crop circle, claiming he was abducted by a
Invincible
An unpredictable researcher accidentally unleashes a dangerous artifact which was previously hidden by Nathan Stark.
Dr. Nobel
A sleeping weapons system is accidentally awakened by Fargo and Spencer. Henry tries to avert the pending catastrophe wi
Blink
Carter investigates an unusual car accident. Meanwhile, Stark, under the stress of completing a project on time, pressur
Right as Raynes
A former resident returns to Eureka and creates mayhem which threatens Global Dynamics, prompting Stark to take action.
Primal
Taggart achieves a medical breakthrough while Fargo invents a device that bridges the divide between computers and human
Purple Haze
Strange behavior exhibited by the townspeople is investigated by Carter,who has to solve the mystery before Stark makes
H.O.U.S.E. Rules
A bad day in the lab forces Carter to rethink his decision to live in Eureka, prompting an intervention from S.A.R.A.H.
Once in a Lifetime
Ambition trumps common sense when Stark is given a chance to try out the Top-secret artifact. Once it's tested, Eureka w
Phoenix Rising
Taggart's theory is that solar flares caused by the eclipse, or the 'Phoenix Effect', are to blame when people start to
Try, Try Again
Fargo accidentally triggers a prototype for a personal force field, which goes out of control, forcing Carter to enlist
Unpredictable
Dr. Whiticus creates an incredible "weather machine" intended to reverse the effects of global warming which instead sti
Games People Play
Carter suffers a blow to the head, and after arguing with Zoe, he suddenly finds himself in a parallel Eureka, where the
Duck, Duck Goose
Falling space debris threatens Eureka residents and Carter turns to high school science fair participants to solve the p
Noche de Sueños
One of the Global Dynamics tanker trucks spills, potentially causing a change in everyone's sleep habits... In the cours
Family Reunion
Fargo's grandfather awakens after 50 years in cryogenic suspension and accuses his rival of putting him there and steali
E=MC...?
As an experiment that will recreate the first moment of the origins of the universe, the Big Bang, goes terribly awry, t
Sight Unseen
An abandoned research project on invisibility returns to haunt Eureka. Carter and Zoé become tangled in a web of strang
God is in the Details
Sudden muteness, human bioluminescence and faucets running blood cause many of Eureka’s citizens to believe that they
Maneater
Sheriff Jack Carter becomes absolutely irresistible to every woman in Eureka. But if he doesn't get his mojo under contr
All That Glitters
Beverly Barlow returns to town just as a parasitic bacterium threatens to destroy Eureka, by turning everything to gold
A Night at Global Dynamics
Nathan Stark and Jack Carter must put aside their rivalry to stop a deadly bacteria from destroying the town and killing
Bad to the Drone
The search is on for an escaped drone as Eva Thorne arrives to assist the cleanup of damages which Global Dynamics has c
What About Bob?
Carter and Allison investigate when a scientist mysteriously disappears from a sealed biosphere. Meanwhile, the "Fixer"
Best in Faux
Eureka's annual dog show is underway and is like none other. Meanwhile, Sheriff Carter experiences an earthquake; Zoe de
I Do Over
It's Allison and Stark's wedding day and Carter finds himself reliving it over and over. Meanwhile, Carter's sister, Lex
Show Me the Mummy
A search for a mummy ensues after a famed archaeologist opens the tomb of an Egyptian queen at Global Dynamics.
Phased and Confused
Carter's job is made more difficult when a super hero emerges. Meanwhile, Zoe and her friends are imperiled when Thorne
Here Come the Suns
The Eureka mayoral race is overshadowed by the sudden arrival of a second sun, forcing Carter, Allison and Zane to inves
From Fear to Eternity
Trust issues are produced by a scientific find, along with sinister results. Zoe's life is in jeopardy, and Eva Thorne k
Welcome Back Carter
Carter interviews for a job with the Department of Homeland Security, after being terminated as the sheriff. Deputy Lupo
Your Face Or Mine
Jo displays atypical behavior after a DNA scan malfunctions, unfortunately it's while she's interim sheriff because Cart
Insane In The P-Brane
Dr. Tess Fontana reopens Section 5, causing objects to become ambulatory , possibly due to poltergeists.
It's Not Easy Being Green
Carter finds himself chasing down creation of blob-ical like proportions when a series of escalating pranks turn deadly.
If You Build It...
Eureka's teenagers who appear to have been manipulated while asleep, gathered in a field where they assembled a strange
Ship Happens
Henry's ship returns causing Carter to fear it maybe linked to the town's deadly electrical anomalies.
Shower the People
Allison's baby shower fetches her a load of eco-friendly gifts and the discovery of a drowned scientist in a location wh
You Don't Know Jack
Global Dynamics sonic cleaning coincides with a phenomenon in which the citizens of Eureka develop a form of amnesia. Me
Have an Ice Day
The first day on the job as temporary head of Global Dynamics proves daunting for Tess when a new Ice Age comes to Eurek
What Goes Around Comes Around
Tess has a job offer from Australia, Zoe is prepared to leave for Harvard and Carter has a magnetic disturbance above Eu
Founder's Day
It's Founder's Day in Eureka and everyone is in the spirit of the celebration until Jack, Allison, Henry, Jo and Fargo a
A New World
When the 5 get back to their time, things are changed everywhere. As Henry tries to fix the machine that transported the
All the Rage
When a prototype sets everyone into bad temper mode, the issue escalates and gets worse beyond the control of what Jack
The Story of O2
It's space week in Eureka, and everyone is gearing up for the rocket race - except for Carter. General Mansfield is in t
Crossing Over
Claudia Donovan visits Eureka to see if Fargo's promises of wondrous devices are true, but she finds herself in the midd
Momstrosity
When Sara gives Andy a (as Zane calls it ) an EMO download to give him emotion, she inadvertently affects all Level 6 AI
Stoned
Love is in the air as Carter gets fed up with Grant's pursuit of Allison, Zoe conceals her love and Henry courts Grace.
The Ex-Files
Eureka's citizens face the return of people from the past; Global Dynamics tests a new device.
I'll Be Seeing You
When Grant and Carter become stranded, they must race back in time to save Eureka.
O Little Town
Carter can't get into the Christmas spirit especially with the town surrounded by a force-field. Fargo organizes the GD
Lift Off
Zane pesters Jo for details she does not want to reveal. Carter problem-solves at Andy and S.A.R.A.H.'s wedding. Elsewhe
Reprise
Carter's duties expand to babysitting when Allison attends a medical conference, and Fargo finds his groove when a certa
Glimpse
Jo receives a technical boost to her crime-fighting ability with lenses that predict security breaches. Allison's headac
Up in the Air
Jack deals with a bank robbery which may relate to the sudden gravity issues besetting the citizens of Eureka. Meanwhile
Omega Girls
When Zoe comes home for a visit, Jo faces an angry woman who doesn't accept her fumbling explanations about Zane. This a
Of Mites and Men
When mites threaten to take down Global Dynamics, Jack is called into action since Jo is in the middle of training. Alli
Clash of the Titans
The Eureka atmosphere becomes toxic when Department of Defense auditor comes to assess the team's relationships.
This One Time at Space Camp...
The Astraeus candidates go through their final interviews while Carter and Allison appeal their relationship audit.
One Small Step...
When an explosion in the Astraeus lab accidentally sends Andy to Titan the team must devise a plan to save him before it
One Giant Leap...
In the season finale - It's chaos in Eureka when an energy beam rips through main street but the Astraeus launch must go
Do You See What I See
The quaint town of geniuses is transformed into animated versions of themselves. Sheriff Carter and Allison Blake are se
Lost
The Astraeus crew returns to Eureka four years later and must adapt to a myriad of changes, including a more oppressive
The Real Thing
The town huddles in a last attempt to locate the vanished Astraeus before it's too late!
Force Quit
Beverly Barlowe resurfaces in Eureka seeking Carter's help to free the Astraeus crew, and the rescue plan lands Carter i
Friendly Fire
When a smart fire experiment gets out of control, Carter and team discover that the Astraeus victims may be the cause.
Jack of All Trades
The crew moves forward after an ordeal and Warren's visit adds to the pressure.
Worst Case Scenario
Henry conducts a preparedness drill that winds up a disaster and Fargo faces a hard reality.
Ex Machina
Fargo is convinced that Holly is still inside of the Matrix computer, but the DOD is determined to wipe its hard drive c
In Too Deep
Carter's romantic surprise for Allison turns deadly when they're trapped in a sinking marine lab with time and oxygen qu
Smarter Carter
When Allison's genius older brother comes to meet her new husband, Carter feels the pressure of not being smart enough t
The Honeymooners
Jack and Allison's perfect honeymoon is interrupted when sabotage is discovered in Eureka. Elsewhere, Holly faces anothe
Mirror, Mirror
Eureka is cut off from the world by a malfunctioning experiment that threatens to eradicate the town's populace.
Double Take
The people of Eureka are being kidnapped and replaced by body-doubles one by one unless Allison, Fargo and Zane can figu
Just Another Day...
Wormholes randomly materialize around Eureka as the Department of Defense is set to shut the town.
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