- 1 Pilot
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After a strange accident sidelines Eureka's sheriff, U.S. Marshal Jack Carter takes over the investigation into the mysterious phenomenon that led to the death of a resident. Carter learns about the secret purpose of the town while trying to re-establish a connection with his angry and bitter daughter, Zoe. He develops a friendly working relationship with government liaison Allison Blake and meets some of the more eccentric residents of Eureka.
Average Episode Rating: 3.0 | Air Date: 2006-07-18
- 2 Many Happy Returns
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Carter and the other citizens of Eureka attend the funeral of Susan Perkins. Much to their surprise, Ms. Perkins makes a return to Eureka as a woman who is very much alive!
Average Episode Rating: 3.0 | Air Date: 2006-07-25
- 3 Before I Forget
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Jack Carter accidentally shoots Henry while suffering from short-term memory loss, meanwhile a visit from a noted scientist may hold clues into to his sudden memory loss.
Average Episode Rating: 3.0 | Air Date: 2006-08-01
- 4 Alienated
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Spencer is apparently abducted by aliens and then returned to earth the next day inside a crop circle. Also, the town is visited by the congressman whose committee is responsible for its government funding.
Average Episode Rating: 3.0 | Air Date: 2006-08-08
- 5 Invincible
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After a lab accident, Global Dynamics researcher Carl Carlson is expelled from Eureka due to lack of results. Later, it is discovered that the accident has unlocked hidden abilities in Carl. Meanwhile, Jack does his best to avoid a physical.
Average Episode Rating: 3.0 | Air Date: 2006-08-15
- 6 Dr. Nobel
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After Fargo and Spencer accidentally activate a doomsday device, Carter must help Dr. Irwin Thatcher, an aging scientist, to shut down the device.
Average Episode Rating: 3.0 | Air Date: 2006-08-22
- 7 Blink
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Carter investigates an unusual car accident. Meanwhile, Stark is under stress to produce results on a project.
Average Episode Rating: 3.0 | Air Date: 2006-08-29
- 8 Right as Raynes
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When the return of Eureka's star pupil causes problems all over town, Stark is forced to make a hard choice. Carter attempts to track down Zoe who has run off with the former resident.
Average Episode Rating: 3.0 | Air Date: 2006-09-05
- 9 Primal
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Fargo invents a device that bridges the gap between computers and human brains
Average Episode Rating: 2.0 | Air Date: 2006-09-12
- 10 Purple Haze
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Strange behavior is affecting the whole town except Sheriff Carter and Zoe. The father and daughter team must find the cause while Stark makes a decision that could affect the world.
Average Episode Rating: 2.0 | Air Date: 2006-09-19
- 11 H.O.U.S.E. Rules
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S.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 in Eureka. Meanwhile her root program B.R.A.D activates and turns the situation deadly.
Average Episode Rating: 3.0 | Air Date: 2006-09-26
- 12 Once in a Lifetime
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Stark is given a chance to try the top-secret Artifact. Once it's tested, Eureka warps into the future and ends up in 2010, where the town is different.
Average Episode Rating: 3.0 | Air Date: 2006-10-03
- 13 Hide and Seek Prologue
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A mysterious presence in the woods outside town first sparks fear, then prompts an investigation which quickly involves all of Eureka's eccentric denizens.
- 14 Hide and Seek (1)
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Video of a beast outside Eureka spurs Carter and Taggert into action.
- 15 Hide and Seek (2)
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Carter, Lupo and Taggart search the woods for the beast
- 16 Hide and Seek (3)
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Allison Blake has a frightening run-in with the creature.
- 17 Hide and Seek (4)
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An autopsy of the creature leads to a shocking discovery.
- 18 Hide and Seek (5)
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Carter follows the latest clues to a fateful confrontation.
- 19 Hide and Seek (6)
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Carter finds the "missing link" to the mystery monster.
- 20 Hide and Seek (7)
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Carter finds the "missing link" to the mystery monster.