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)
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)
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)
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)
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)
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)
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.
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)
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)
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)
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)
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)
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)
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)
