Jack is called upon for seemingly insignificant investigations into a break-in in an artificial mucus lab and the possible sabotage of exploding robotic dogs, which end up being both significant and connected. The mucus lab break-in is actually an earthquake, caused by a bitter GD scientist using an acoustic thingamabob to create man-made diamonds that she then slipped into the robotic dogs' processors. The diamond overloaded the dogs' circuits, causing them to explode. The acoustic thingamabob also created a pocket of magma under Eureka that's threatening to rush to the surface in the form of a volcano. With the help of geologist Dr. Hood's tunnel machine, Jack, Stark, and Fifi the robodog go underground to try to find the magma pocket and divert it to Eureka's lake, where it can flow without harming anything, except the lake's wildlife.
In other news, Allison tries on a wedding dress, Zoe is practically forced into taking advanced physics, and Eva asks Henry to repay her favor of freeing him from jail by testing a prospective hotel site for radiation. He finds a whole lot of it, and in a form that used to exist only theoretically. Though Eva tells him to keep this quiet, Henry tells Jack because he doesn't keep secrets from his friends (anymore).
I'd like to open this is recap by saying how pleased I was to find an episode free of product placement, especially when there was so much opportunity for it in the subject matter. It's so nice to watch a real TV show instead of an infomercial. I was so happy, in fact, that I did a little dance and worked up quite a sweat. Fortunately, my Secret antiperspirant kept my underarms fresh and dry.
As usual, we open in Café Diem, where, also as usual, Carter is making Zoe's life miserable. This time he's pressuring her to take an accelerated physics class. Zoe thinks it's too much pressure, but Carter points out that pressure can make diamonds. Yeah, and diamonds make for years and years of civil wars, genocide, and human rights violations. It all depends on how you look at it, really. Zoe stupidly says she'd rather have time to hang out with her friends, which gives Carter the opening to say that if she doesn't have time for accelerated physics then he'll make her quit her job. And that's how Zoe was forced to take accelerated physics.
She storms off into the kitchen as Carter turns to get barked at by Fargo's dog. That's when he realizes that the restaurant is full of dogs. Jo walks in, and he asks her when Café Diem became Café Doghouse. She explains that the dogs are lifelike robots. Carter guesses that GD must be trying to develop robot dog soldiers. That isn't what's going on, but Jo thinks it's just about the most awesome idea she's ever heard. And that's why Jo works outside of GD, in a decidedly non-scientist career. Robot dog soldiers are only cool when you're eight years old and they're a Saturday morning cartoon. Jo explains that these robot dogs are the GD scientists' idea of fun, warning Carter that they get very competitive with each other when it comes to the annual dog show.
Allison and Stark enter the restaurant arm-in-arm. Doesn't anyone in Eureka make their own breakfast anymore? I guess I'd go there every day, too, if it were free. But then I'd always want to order tons of pancakes and bacon and corned beef hash. And I'd get really fat. So it's good for me that food costs money. Anyway, Allison and Stark are being all obnoxious and lovey-dovey in front of Carter as they discuss wedding plans. When Allison starts loudly talking about their wedding night the first time around, Carter clears his throat and reminds her that she's in public. Stark tells Allison to leave all the planning to him, saying all she has to do is show up. Allison says she still has to have her hair and make-up done, and buy a dress. Oh, just rock the off-white sensible pants suit, Allison. You know you want to. Jo displays a previously unknown feminine side when she volunteers to go dress shopping with Allison. Or maybe she's just being masochistic. Because wedding dress shopping when you're not the one who's getting married (and, sometimes, when you are) is torture. But Jo says she likes weddings and threatens to beat the crap out of Stark if he has a problem with that.