Tess has a job offer from Australia, Zoe is prepared to leave for Harvard and Carter has a magnetic disturbance above Eureka to contend with, in the third season finale.
The first day on the job as temporary head of Global Dynamics proves daunting for Tess when a new Ice Age comes to Eureka; and a familiar face returns in the process.
Global Dynamics sonic cleaning coincides with a phenomenon in which the citizens of Eureka develop a communal form of Alzheimer’s disease. Meanwhile, Allison goes into labor.
Allison’s baby shower fetches her a load of eco-friendly gifts and the discovery of a drowned scientist in a location where drowning is impossible.
Henry’s ship returns causing Carter to fear it maybe linked to the town’s deadly electrical anomalies.
Eureka’s teenagers who appear to have been manipulated while asleep, gathered in a field where they assembled a strange structure comprised of scrap metal and electronics.
3×12 | It’s Not Easy Being Green Carter finds himself chasing down creation of blob-ical like proportions when a series of escalating pranks turn deadly. Elsewhere, long-term rivals from Area 51 come to Eureka for a bowling tournament.
3×11 | Insane In The P-Brane Dr. Tess Fontana reopens Section 5, causing objects to become ambulatory , possibly due to poltergeists.
Carter’s recertification exam tests both his body and mind. Allison explains the new town wide DNA-monitoring security system to Henry which leaves Deputy Lupo injured during its initial scan.
3×09 | Welcome Back Carter Carter interviews for a job with the Department of Homeland Security, after being terminated as the sheriff. Deputy Lupo decides to resign after discovering that a very personable robot is the new sheriff.