Eureka becomes animated after a strange wave of colors washes over the town.

In the Season 4 finale, 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.

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.

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 ...

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.

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

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

Carter must solve a bank robbery or the town may float away.

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 cal...

A rocket scientist arrives at Caf? 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.

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.

Carter?s plans to visit family for the holidays are thwarted when he, Zoe and the rest of the town are trapped in Eureka by a glitchy electromagnetic shield ? during a very un-Christmassy heat wave.

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 catas...

People from their pasts haunt Carter and the gang while unknown forces attack Eureka.

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.