The Astraeus candidates go through their final interviews while Carter and Allison appeal their relationship audit.

When the 5 get back to their time, things are changed everywhere. As the Henry tries to fix the machine that transported them in the first place, Dr. Grant is…

When a prototype sets everyone into bad temper mode, the issue escalates and gets worse beyond the control of what Jack can handle. As Jack and Allison and Tess are…

It’s space week in Eureka, and everyone is gearing up for the rocket race – except for Carter. General Mansfield is in town for the big Race to the Moon,…

Claudia Donovan visits Eureka to see if Fargo’s promises of wondrous devices are true, but she finds herself in the middle of a mystery suitable for Warehouse 13 when objects…

Love 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 may have to…

Eureka’s citizens face the return of people from the past; Global Dynamics tests a new device.

It’s Founder’s Day in Eureka and everyone is in the spirit of the celebration until Jack, Allison, Henry, Jo and Fargo are transported back to 1947 where they meet some…

The first day on the job as temporary head of Global Dynamics proves daunting for Tess when a new Ice Age comes to Eureka; and a familiar face returns in…

Jo displays atypical behavior after a DNA scan malfunctions, unfortunately it’s while she’s interim sheriff because Carter is undergoing a 48-hour DOD recertification test.

Dr. Tess Fontana reopens Section 5, causing objects to become ambulatory , possibly due to poltergeists.

Carter finds himself chasing down creation of blob-ical like proportions when a series of escalating pranks turn deadly. Elsewhere, long-term rivals from Area 51 come to Eureka for a bowling…

Allison’s baby shower fetches her a load of eco-friendly gifts and the discovery of a drowned scientist in a location where drowning is impossible.

Global Dynamics sonic cleaning coincides with a phenomenon in which the citizens of Eureka develop a form of amnesia. Meanwhile, Allison goes into labor.

Eureka’s annual dog show is underway and is like none other. Meanwhile, Sheriff Carter experiences an earthquake; Zoe debates quitting the accelerated physics program; and Allison starts the process 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.

A search for a mummy ensues after a famed archaeologist opens the tomb of an Egyptian queen at Global Dynamics.

Carter’s job is made more difficult when a super hero emerges. Meanwhile, Zoe and her friends are imperiled when Thorne makes a subterranean search beneath Eureka.

The Eureka mayoral race is overshadowed by the sudden arrival of a second sun, forcing Carter, Allison and Zane to investigate it more closely.

Trust issues are produced by a scientific find, along with sinister results. Zoe’s life is in jeopardy, and Eva Thorne knows what has caused the predicament.

Carter interviews for a job with the Department of Homeland Security, after being terminated as the sheriff. Deputy Lupo decides to resign after discovering that a very personable robot is…

The search is one for an escaped drone as Eva Thorne arrives to assist the clean up of damages which Global Dynamics has caused.

Carter and Allison investigate when a scientist mysteriously disappears from a sealed biosphere. Meanwhile, the “Fixer” tries to make Eureka’s efforts more profitable.

Sheriff Jack Carter becomes absolutely irresistible to every woman in Eureka. But if he doesn’t get his mojo under control, they might just eat him alive.

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.

As an experiment that will recreate the first moment of the origins of the universe, the Big Bang, goes terribly awry, the town’s geniuses turn into morons, leaving the fate…

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…

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.

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

Carter suffers a blow to the head, and after arguing with Zoe, he suddenly finds himself in a parallel Eureka, where the residents seem to be mysteriously vanishing.

Falling space debris threatens Eureka residents and Carter turns to high school science fair participants to solve the problem. Specifically, he taps a student science project created to harness the…

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…

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…

Strange behavior exhibited by the townspeople is investigated by Carter,who has to solve the mystery before Stark makes a decision that could affect the world.

Ambition trumps common sense when Stark is given a chance to try out the Top-secret artifact. Once it’s tested, Eureka warps into the future and ends up in 2010, where…

After hosting a movie party, Spencer is found the next day in the middle of a crop circle, claiming he was abducted by aliens; and then other people who attended…

An unpredictable researcher accidentally unleashes a dangerous artifact which was previously hidden by Nathan Stark.

A sleeping weapons system is accidentally awakened by Fargo and Spencer. Henry tries to avert the pending catastrophe with the help of a retired, nonsensical scientist.

Carter investigates an unusual car accident. Meanwhile, Stark, under the stress of completing a project on time, pressures two research teams to produce results.

A former resident returns to Eureka and creates mayhem which threatens Global Dynamics, prompting Stark to take action.