During the Founder's Day celebration, Jack, Allison, Fargo, Henry, and Jo somehow end up in 1947, in the middle of the army base that existed before Eureka was founded. T ...

The gang returns from 1947 and discover that things are not as they remember them. And Dr. Grant came along. ...

Wil Wheaton guest stars as Dr. Isaac Parrish, an underappreciated scientist whose hostility appears to have gone viral. Blind rage is infecting everyone at Global Dynamic ...

Allison deals with a major problem during Eureka's space week festival. Written by Anonymous ...

Claudia Donovan pays a visit to Eureka, hoping to see some amazing technological wonders. She gets more than she bargained for when seemingly random objects begin appeari ...

Allison accepts Carter's offer to include Kevin in a camping trip for some guy time, and Henry decides to level with Grace while a very peculiar -- and dangerous -- relat ...

Romantic relationships are in flux. Zoe is home for a visit and hints at a new heartthrob. Henry is courting his wife while Dr. Grant and Carter spar over Allison. Jo, on ...

As Grace (Tembi Locke) finds a way to share her memories with Henry (Joe Morton), the rest of Eureka's citizens face the return of people from the recent - or not so rece ...

Mid-Season Finale! Closer than they've ever been before, Allison (Salli Richardson-Whitfield) and Carter (Colin Ferguson) join forces personally as well as professionally ...

Sheriff Carter relates a Christmas story in which the defensive field malfunctions trapping everyone in town for the holiday. So Fargo throws a big party, unaware that th ...

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 ...

When Eurekans start behaving oddly, Carter scours the town for a cause - never suspecting that Allison, miles from home, is the one facing real danger. ...

Carter and Jo try out Zane's new high-powered risk assessment system, but find that even it may not be a match for the dangerous level of competition among Eureka's scien ...

Carter must solve an only-in-Eureka bank robbery before the town floats away, while Allison deals with unsettling episodes of lost time. ...

The predicted danger posed by Allison materializes when she is subjected to mind control to steal Eureka's secrets. ...

When the microbots assembling the Titan space craft finish their task they opt to take on a new project and proceed to devour Eureka in the process. In isolation for a mi ...

Preparations for the Titan mission have the unintended consequence of turning the local Eureka environment into Titan's. Meanwhile, Eureka couples struggle to come to ter ...

As the Astraeus candidates undergo final interviews, Carter and Allison appeal the results of their relationship audit while trying to keep a lid on escalating mishaps ar ...

Grace embraces an honor that strains her relationship with Henry while Deputy Andy becomes an accidental guinea pig for the Astraeus mission -- with catastrophic results. ...

Hours before the launch of the Titan mission Eureka struggles with black holes and, having decided who will stay and who will go, goodbyes. ...

In Eureka's Do You See What I See, the quaint town of geniuses is transformed into animated versions of themselves. Sheriff Carter (Colin Ferguson) and Allison Blake (Sal ...