Eureka

1. S01E01PilotJuly 18, 2006 7.6After a strange accident sidelines Eureka's sheriff, U.S. Marshal Jack Carter takes over the investigation into the mysterious phenomenon th
2. S01E02Many Happy ReturnsJuly 25, 2006 7.7Carter and the other citizens of Eureka attend the funeral of Susan and Walter Perkins. Much to their surprise, Susan makes a return to Eure
3. S01E03Before I ForgetAugust 1, 2006 7.8Jack Carter accidentally shoots Henry while suffering from short-term memory loss, and the visiting scientist whose wife is Henry's old flam
4. S01E04AlienatedAugust 8, 2006 7.6Spencer is apparently abducted by aliens and then returned to Earth the next day inside a crop circle. Also, the town is visited by Congress
5. S01E05InvincibleAugust 15, 2006 7.3After a lab accident, Global Dynamics researcher Carl Carlson is expelled from Eureka due to lack of results. Later, it is discovered that t
6. S01E06Dr. NobelAugust 22, 2006 7.6After Fargo and Spencer accidentally activate a doomsday device, Carter must help Dr. Irwin Thatcher, an aging scientist, to shut down the m
7. S01E07BlinkAugust 29, 2006 7.2Carter investigates an unusual car accident. Meanwhile, Stark is under stress to produce results on a project.
8. S01E08Right as RaynesSeptember 5, 2006 7.1When the return of Eureka's star pupil causes problems all over town, Stark is forced to make a hard choice. Meanwhile, Carter attempts to t
9. S01E09PrimalSeptember 12, 2006 7.1A nanotech experiment escapes from Global Dynamics. The project, which bridges the gap between computers and human brains, threatens to over
10. S01E10Season's bestPurple HazeSeptember 19, 2006 8.1Sheriff Carter and Zoe are the only ones unaffected when Eureka's residents begin to behave strangely, so father and daughter team up to sea
11. S01E11H.O.U.S.E. RulesSeptember 26, 2006 7.4S.A.R.A.H.—the artificial intelligence that runs Carter's house—takes him and a group of residents hostage in an intervention to keep Carter
12. S01E12Once in a LifetimeOctober 3, 2006 7.8Following an experiment on the artifact, Eureka warps to 2010. However, temporal anomalies begin to cause problems for Eureka, which leads t

Season 1 ranked & reviewed

1. S02E01Phoenix RisingJuly 10, 2007 6.9Reorienting himself to the timeline restored in "Once in a Lifetime", Sheriff Carter investigates a series of sudden deaths.
2. S02E02Try Try AgainJuly 17, 2007 7.2Carter and Stark are forced to team up when Global Dynamics is threatened by an expanding personal force field.
3. S02E03UnpredictableJuly 24, 2007 7.1An isolated deep freeze trigger causes a chain reaction of sudden weather changes in Eureka.
4. S02E04Games People PlayJuly 31, 2007 7.3After receiving a hit to the head, Carter finds that he is in a parallel Eureka where he discovers that its residents are mysteriously disap
5. S02E05Duck, Duck GooseAugust 7, 2007 7.2Space debris threatens Eureka after it accumulates into a large cloud and Carter investigates in an effort to avert potential disaster.
6. S02E06Season's bestNoche de SuenosAugust 14, 2007 7.5The denizens of Eureka are experiencing shared dreams. What is considered humorous at first soon takes a dire turn for the worse.
7. S02E07Family ReunionAugust 21, 2007 7.3Douglas Fargo's grandfather, Pierre, is accidentally awakened from his cryogenic slumber. However, Pierre makes it clear that he was not wil
8. S02E08E=MC...?August 28, 2007 6.8As an experiment that will recreate the first moments of the origins of the universe, the "Big Bang", goes terribly awry, the town's geniuse
9. S02E09Sight UnseenSeptember 4, 2007 6.9Strange happenings and spreading radiation at Global Dynamics lead to speculations that an abandoned research project concerning invisibilit
10. S02E10God Is in the DetailsSeptember 11, 2007 6.8A series of strange events causes Eureka's residents to worry that a biblical plague may be upon them.
11. S02E11ManeaterSeptember 18, 2007 6.9The women of Eureka become infatuated with Sheriff Carter, who they find irresistible.
12. S02E12All That GlittersSeptember 25, 2007 6.8Eureka faces an inexplicable quandary when metal objects—and people too—begin turning to gold.
13. S02E13A Night at Global DynamicsOctober 2, 2007 6.8Global Dynamics goes into lockdown to protect itself from the now airborne metal-eating bacteria. Stuck inside GD, Sheriff Carter and Stark

Season 2 ranked & reviewed

1. S03E01Bad to the DroneJuly 29, 2008 6.8Eureka is threatened by an intelligent drone with "issues" after an anti-missile test. Meanwhile, Eva Thorne, nicknamed "The Fixer", after d
2. S03E02What About Bob?August 5, 2008 6.8Sheriff Carter and Allison investigate the disappearance of a scientist from a sealed biosphere. Meanwhile, "The Fixer" attempts to make Eur
3. S03E03Best in FauxAugust 12, 2008 6.7The town's annual dog show gets into full swing—complete with exploding robotic canines. Meanwhile, Sheriff Carter experiences an isolated e
4. S03E04I Do OverAugust 19, 2008 7.3On Allison and Stark's wedding day, Sheriff Carter finds himself stuck in a time loop, causing him to experience the same lousy day over and
5. S03E05Show Me the MummyAugust 26, 2008 7.0When an Egyptian tomb is opened at Global Dynamics, strange things start to happen, leading Fargo to believe it is the mummy's curse. The mu
6. S03E06Phased and ConfusedSeptember 9, 2008 6.9A mysterious "superhero" who can walk through walls is causing a ruckus in Eureka. Meanwhile, Zoe and her friends become stranded with Zane
7. S03E07Here Come the SunsSeptember 16, 2008 7.0The town's mayoral race is disrupted when Zoe's science partner inadvertently causes a second sun to appear over Eureka.
8. S03E08From Fear to EternitySeptember 23, 2008 7.4As Eva Thorne prepares to seal off the subterranean military complex, Zoe's life is endangered as her body begins to rapidly age.
9. S03E09Welcome Back CarterJuly 10, 2009 6.9Carter attends a job interview with the Department of Homeland Security. Deputy Lupo hands in her resignation on learning her new boss is a
10. S03E10Your Face or MineJuly 17, 2009 6.9It is time for physical exams for the Sheriff's department and an upgrade for the town's security system, both Eureka-styled by Global Dynam
11. S03E11Insane in the P-BraneJuly 24, 2009 7.2When objects begin moving on their own, Carter and newcomer Dr. Tess Fontana visit the "other side" to find the answer.
12. S03E12It's Not Easy Being GreenJuly 31, 2009 7.1When the bowling team from Area 51 hits town, the long-standing rivalry-cum-war is reignited, and a prank goes horribly wrong. Now Carter no
13. S03E13Season's bestIf You Build It...August 7, 2009 7.7A wave of wholesale looting hits Eureka as the signal draws closer, and when the missing objects turn up in a field as part of five towers b
14. S03E14Ship HappensAugust 14, 2009 7.2Henry's 20-year-old project returns with more on board than it left with, and when a man is killed and another injured, Henry will have to f
15. S03E15Shower the PeopleAugust 21, 2009 7.0Carter investigates the deaths of scientists who drowned in less than liquid circumstances. Meanwhile, Allison's baby shower goes green.
16. S03E16You Don't Know JackAugust 28, 2009 7.3Tess begins a time capsule project for the town on the same day as Global Dynamic's annual sonic cleaning. Unfortunately, Fargo's attempt to
17. S03E17Have an Ice DaySeptember 11, 2009 6.8The uneventful first day that Tess plans as the interim head of Global Dynamics is shattered by Taggart's reappearance and plunging temperat
18. S03E18What Goes Around, Comes AroundSeptember 18, 2009 7.0Tess' reign as head of Global Dynamics may be shorter than planned after she receives an offer from Australia. Elsewhere, the town deals wit

Season 3 ranked & reviewed

1. S04E01Founder's DayJuly 9, 2010 7.8The 60th anniversary of Eureka becomes life changing in more ways than one when a marriage proposal is eclipsed by a mysterious transport to
2. S04E02A New WorldJuly 16, 2010 7.4As the Founders' Day festivities continue, Carter and the others must accustom themselves to the new time line and how Dr. Grant fits into i
3. S04E03All the RageJuly 23, 2010 7.5Dr. Isaac Parrish, the brilliant director of the Non-lethal Weapons Lab, is feeling a little undervalued these days. Then all his latent hos
4. S04E04The Story of O2July 30, 2010 7.1As Eureka celebrates Space Week, Dr. Ramsey unveils his cutting edge invention that could allow colonization of Mars. Unfortunately, a sligh
5. S04E05Crossing OverAugust 6, 2010 7.6Claudia Donovan visits Eureka to see if Fargo's promises of wondrous devices are true, but she finds herself in the middle of a mystery suit
6. S04E06MomstrosityAugust 13, 2010 7.0Carter's camping trip with Kevin becomes a little scarier than ghost stories by the camp fire when a malfunction with the AI at Global Dynam
7. S04E07StonedAugust 20, 2010 7.4Love is in the air as Carter gets fed up with Grant's pursuit of Allison, Zoe conceals her love and Henry courts Grace. But all the emotions
8. S04E08The Ex-filesAugust 27, 2010 7.8Just as Carter and Allison seem to get everything right, people from their pasts appear to complicate things. Elsewhere, GD's new project pe
9. S04E09I'll Be Seeing YouSeptember 10, 2010 7.7After the D.E.D. device disappears, Carter, Jo, Fargo and Allison find themselves in a déjà vu situation as their investigation puts Trevor
10. S04E10O' Little Town...December 7, 2010 6.9Carter can't get into the Christmas spirit especially with the town surrounded by a force-field. Fargo organizes the GD holiday party, and A
11. S04E11LiftoffJuly 11, 2011 7.7Zane pesters Jo for details she does not want to reveal. Carter problem solves at Andy and S.A.R.A.H.'s wedding. Elsewhere, Zane's actions m
12. S04E12RepriseJuly 18, 2011 7.6Carter's duties expand to babysitting when Allison attends a medical conference, and Fargo finds his groove when a certain song is played. M
13. S04E13GlimpseJuly 25, 2011 7.8Lenses that predict security breaches are eagerly embraced by Jo, but not so much by Carter. Although he can't argue their importance after
14. S04E14Up in the AirAugust 1, 2011 8.0Carter deals with a bank robbery which may relate to the sudden gravity issues besetting the citizens of Eureka. Meanwhile, Fargo's rivalry
15. S04E15Omega GirlsAugust 8, 2011 7.8When Zoe comes home for a visit, Jo faces an angry woman who doesn't accept her fumbling explanations about Zane. This all fades to backgrou
16. S04E16Of Mites and MenAugust 15, 2011 8.1Global Dynamics deals with two threats — a visit from Senator Wen and robotic bugs that can consume everything; it's unclear which is the bi
17. S04E17Clash of the TitansAugust 22, 2011 7.6Preparations for the Titan mission have the unintended consequence of turning the local Eureka environment into Titan's. Meanwhile, Eureka c
18. S04E18This One Time at Space Camp…August 29, 2011 7.4Attacks in town may scuttle the Astraeus mission in the same week the final 20 will be named. Carter and Allison appeal the auditor's recomm
19. S04E19One Small StepSeptember 12, 2011 7.7When an explosion in the Astraeus lab accidentally sends Andy to Titan, the team must devise a plan to save him before it's too late.
20. S04E20Season's bestOne Giant LeapSeptember 19, 2011 8.3The Astraeus participants make their farewells to their earthbound family and friends. Elsewhere, Carter and Jo investigate the person (or t

Season 4 ranked & reviewed

1. S05E01LostApril 16, 2012 7.8When the ship with the Astraeus crew returns to earth, its occupants discover that four years have elapsed and time isn't the only thing tha
2. S05E02The Real ThingApril 23, 2012 7.6After Senator Wen calls off the search, Kevin designs a tool to find the Astraeus ship, which is still missing after four months. Unfortunat
3. S05E03Force QuitApril 30, 2012 8.0Carter and Jo continue their search for the missing Astraeus crew. A surprising source confirms the new theory of the disaster, and offers t
4. S05E04Friendly FireMay 7, 2012 7.6The Astraeus crew members attempt to overcome their experiences in the matrix; Fargo deals with Holly's death, Grace struggles to maintain h
5. S05E05Jack of All TradesMay 14, 2012 7.9Carter starts to swap bodies uncontrollably, which puts both his body and his consciousness in awkward situations. Meanwhile, Warren Hughes
6. S05E06Worst Case ScenarioMay 21, 2012 7.8It's disaster drill day at GD and everyone must participate in order to see how well they would do in a disaster. Unfortunately the computer
7. S05E07Ex-MachinaJune 4, 2012 7.7The Department of Defense insists on installing new security and removing all Astraeus artifacts, but Fargo resists because he believes Holl
8. S05E08In Too DeepJune 11, 2012 7.6Carter and Allison's romantic plans run afoul of a rogue submarine, and it's up to Jo to save their lives … if she can fix the mess at Globa
9. S05E09Smarter CarterJune 18, 2012 8.0While under the influence of a smart drug, Carter becomes a genius like everyone else in town and starts to change the laws of physics. Unfo
10. S05E10The HoneymoonersJune 25, 2012 7.5Carter and Allison's perfect honeymoon is interrupted when sabotage is discovered in Eureka. Elsewhere, Holly faces another hurdle to remain
11. S05E11Mirror, MirrorJuly 2, 2012 7.9The Department of Justice arrives to investigate Grace, and Henry struggles with his conscience. Holly receives a message that triggers a ch
12. S05E12Season's bestDouble TakeJuly 9, 2012 8.1The doubles steadily take over GD, which means Fargo, Allison and Zane are in a fight for their lives and everyone else's as they try to avo
13. S05E13Just Another DayJuly 16, 2012 7.5In the series finale, the Department of Defense's closure of Eureka is delayed by random wormhole materializations.

Season 5 ranked & reviewed