Reaccustoming to the timeline restored in "Once in a Lifetime", Sheriff Carter investigates a series of sudden passings.

Carter and Stark are forced to team up when Global Dynamics is threatened by an expanding personal forcefield.

An isolated deep freeze trigger causes a chain reaction of sudden weather changes in Eureka.

After receiving a hit to the head, Carter finds that he is in a parallel Eureka. He discovers that the residents of the parallel Eureka are mysteriously disappearing.

Space debris threatens Eureka after it accumulates into a large cloud. Carter investigates in an effort to avert potential disaster.

The denizens of Eureka are experiencing shared dreams. What is considered humorous at first soon takes a dire turn for the worst.

Douglas Fargo's grandfather, Pierre, is accidentally awakened from his cryogenic slumber. However, Pierre makes it clear that he was not willingly "frozen".

An experiment to recreate the big bang seems to be causing Eureka's finest to become dumber and dumber, including everyone involved in the experiment. When it comes to the verge of destroying Global Dynamics, the fate of the town lies in the hands of Jack Carter and the team of scientists he assembles, amongst them the newest member of the town, an anti-social genius.

Strange happenings and spreading radiation at Global Dynamics lead to speculations that an abandoned research project concerning invisibility might have been revived. When Sheriff Carter accidentally becomes involved, the effects of invisibility threaten his life.

A series of strange events causes Eureka's residents to worry that a biblical plague may be upon them.

The women of Eureka become infatuated with Sheriff Carter, who they find irresistible.

Eureka faces an inexplicable quandary when metal objects—and people too—begin turning to gold.

Global Dynamics goes into lockdown to protect itself from the now airborne metal-eating bacteria. Stuck inside GD, Sheriff Carter and Stark must work together to save both the town and Kevin, Alison's son.