Season Four Episode Guide

Founder's Day

Episode #: 401
Air Date: 07.09.10

Carter and friends are mysteriously transported to a dangerous military installation. Getting home seems impossible, but whether they escape or not, their journey will have life-altering repercussions. (Syfy)

A New World

Episode #: 402
Air Date: 07.16.10

Carter and his fellow travelers begin to realize the startling implications of their return to Eureka — and of Dr. Grant’s unnerving appearance in their midst. (Syfy)

All the Rage

Episode #: 403
Air Date: 07.23.10

Wil Wheaton guest stars as Dr. Isaac Parrish, an under-appreciated scientist whose hostility appears to have gone viral. Blind rage is infecting everyone at Global Dynamics with potentially catastrophic results—especially for Fargo. (Syfy)

The Story of O2

Episode #: 404
Air Date: 07.30.10

Allison struggles to relate to her son and deals with inadvertent mayhem during Eureka's Space Week festival, while Carter wonders if the Zoe he is about to visit at Harvard will be the daughter he remembers. (Syfy)

Crossing Over

Episode #: 405
Air Date: 08.06.10

Carter enlists the help of Warehouse 13's Claudia Donovan when strange objects materialize in Eureka that could erase the town. (TV Guide)


Episode #: 406
Air Date: 08.13.10

Carter goes camping with Kevin, and Henry wants to come clean with Grace while a peculiar relationship threatens Eureka. (TV Guide)


Episode #: 407
Air Date: 08.20.10

Tensions between Carter and Grant over Allison peak, Henry woos his own wife and Zoe deals with a secret love as something begins turning townsfolk into stone. (TV Guide)

The Ex-Files

Episode #: 408
Air Date: 08.27.10

People from their pasts haunt Carter and the gang while unknown forces attack Eureka. (TV Guide)

I'll Be Seeing You

Episode #: 409
Air Date: 09.10.10

A stolen Global Dynamics project brings Carter, Allison, Jo and Fargo together, and Grant's disappearance turns him into a suspect in the theft. Carter and Jo find evidence linking Grant to Beverly Barlowe before a catastrophe strikes. (TV Guide)

O' Little Town

Episode #: 410
Air Date: 12.07.10
Our Rating:

Sheriff Carter tells the story of an unforgettable holiday in Eureka, when an unstable hydrogen crystal grows to dangerously large proportions and Taggart tries to replicate the science behind Santa Claus.


Episode #: 411
Air Date: 07.11.11

Carter lands in an awkward situation after S.A.R.A.H. and Andy's nuptials hit a snag; Zane keeps harassing Jo for details; an unscheduled launch presents trouble for the gang. (TV Guide)


Episode #: 412
Air Date: 07.18.11

A rocket scientist arrives at Café Diem; a song prompts Fargo to display some fighting moves; Carter is tasked with minding Allison's kids while she leaves town for a medical conference. (TV Guide)


Episode #: 413
Air Date: 07.25.11

Applicants swarm Fargo after he solicits volunteers for a space mission; persistent headaches plague Allison; Carter plans a getaway; Lupo is fitted with special lenses that help predict possible security threats and calamities. Wil Wheaton and Stan Lee guest star. (TV Guide)

Up In The Air

Episode #: 414
Air Date: 08.01.11

Carter must solve a bank robbery or the town may float away. (TV Guide)

Omega Girls

Episode #: 415
Air Date: 08.08.11

Lupo tries to explain to Zoe what happened with Zane, but the ladies find a bigger problem in town. (TV Guide)

Of Mites And Men

Episode #: 416
Air Date: 08.15.11

Robotic bugs plague Global Dynamics, and Carter talks to Allison about her mental state. (TV Guide)

Clash of the Titans

Episode #: 417
Air Date: 08.22.11

Jo has wedding ideas for Henry and Grace; the Department of Defense sends a relationship auditor to assess Carter and Allison; Tiny's return threatens the town with poisonous gases. (TV Guide)

This One Time At Space Camp ...

Episode #: 418
Air Date: 08.29.11

Sen. Wen conducts final evaluations of the Astraeus candidates, and the aspiring crew mates are fitted with memory-reading devices that expose their inner motives for wanting to join the mission; Carter and Allison wear the memory-reading devices as part of their appeal to reverse the ruling on their relationship; bizarre attacks occur around town that could threaten the Astraeus mission. (TV Guide)

One Small Step

Episode #: 419
Air Date: 09.12.11

Carter and Taggart probe the mystery of a melted cow; Jo questions what she wants from life; a malfunction strands Deputy Andy on Titan; Carter and Allison contemplate what's next for their relationship. (TV Guide)

One Giant Leap

Episode #: 420
Air Date: 09.19.11

Carter and Jo respond to a mysterious attack on the presidential convoy; good-byes are exchanged before the Astraeus mission is launched; and cosmic anomalies threaten Eureka. (TV Guide)

Do You See What I See

Episode #: 421
Air Date: 12.06.11

In a special Christmas episode, an experiment gone wrong transforms Eureka and its residents into cartoons.