Carter (Colin Ferguson) is proud that Zoe (Jordan Hinson) has been invited into the accelerated physics program. Zoe fears she will have no life but physics. Zoe is not the only one feeling pressured. The annual dog show is coming up and, as Jo Lupo (Erica Cerra) tells Carter, competition is ruthless. The dogs are biomimetic and the prize goes to the inventor who can build the most life-like entry. Carol Taylor's (Gabrielle Rose) Fifi was Best in Show for the last two years. She wants a third win but faces serious competition from Dr. Anne Young (Lexa Doig) and Thunder. When the dogs meet, Fifi falls apart – literally. Surprisingly, Eva Thorne wants Carter to investigate this mishap. While Jo and Carter investigate a possible lab break-in, the building shakes violently. Oddly, only Carter experiences this earthquake. Later, Allison (Salli Richardson-Whitfield) tells him an earthquake in Eureka is virtually impossible. Fargo (Neil Grayston) suggests Carter check with Dr. Hood (Alan Ruck), Eureka's retired geologist, about the apparent quake. Initially, Hood is dubious, but later he erupts out of Main Street in his tunneler and says pressure is building somewhere beneath Eureka. He begins to investigate as Carter goes back to the destroyed dog case and immediately finds a second biomimetic victim. Another earthquake brings Allison, in the midst of her wedding preparations, and Carter to a field where Dr. Hood correctly predicts a mud geyser. Now even Stark concedes the existence of a magma pocket under the town. In their own version of "Journey to the Center of the Earth," Carter and Stark tunnel under Eureka in a desperate bid to release the deadly pressure.