The D.O.D. has sent in a business shark to perform an evaluation of Global Dynamics' viability, and everything that could possibly go wrong, does. Including a drone, whose boosted AI turns it into a killing machine.
Carter is frustrated when he's told to investigate when robotic dogs begin exploding, believing it's a waste of his time. He's even more frustrated when no one else feels the earthquakes he's experiencing.
It's Allison's wedding day, and Carter is stuck in a time loop that causes him to relive it over and over. Unfortunately, there's no simple act that will right things, and the solution may prove very costly.
An opened sarcophagus unleashes a plague onto those who opened the tomb, and when it threatens Eureka, Carter has to devise a temperate fix. Meanwhile, Allison thinks she's gong crazy when she keeps seeing Nathan.
All of Eva Thorne's secrets are revealed when she pushes for early destruction of the bunker. Zoe begins to experience the effect of the substance in which she slipped, leaving Carter to risk his life and job in order to save her.
Henry tries to figure out why his spaceship came home, why it recreated Kim and especially how he's going to relate to her. Meanwhile the sheriff's office tries to return all the property the spaceship used to create its boson safety net without too many mix-ups and then how to get it all back to save the earth.
Women who attended a Allison's baby shower are turning up drowned and there was no apparent source for the water. There doesn't seem to be anyway to extract the data stored in Kim's body without destroying her. Jack develops a severe case of sympathetic pregnancy.