Synopsis
Lois accidentally hits a dog and brings it back to the farm to heal, but Clark quickly realizes it has super-strength. He investigates and discovers it was part of an aborted LuthorCorp experiment...and that robbers are using the dogs to help them steal money. Meanwhile, Lana wonders what Jason is up to with his mother, and Jason is forced to ask Genevieve a few questions of his own.
Full Recap
Two brothers pull in front of a store and the owner looks up to find two dogs viciously attacking him – one holds him off while the other rips the safe door off its hinges. The black dog attacks the owner and busts through a locked refrigerator to badly injure him. Outside the two brothers call the dogs, Hercules, but the other one, Einstein, refuses to come. Driving down the road nearby, Lois hits Einstein, injuring him. She brings him back to the Kent farm, where he quickly gets loose and alerts Jonathan and Clark.
Clark takes a shine to the dog, and the next day Chloe comes visiting to deliver Lois' mail. The dog quickly busts free, wrecking a tractor, and Clark quickly recognizes it has super-strength. He also discovers the dog has a microchip ID in its neck. At the vet Einstein reacts badly to the guy who works there, Zack, and who is one of the robbers. The dog is registered to LutherCorp but Clark decides to keep the dog and goes to visit Lex, but not before signing in. Zack and his sadistic brother Josh have the dogs in the back and are doing experiments with green kryptonite injections that give them temporary super-strength. Josh was a trainer at LuthorCorp and stole the research.
At Lex's, Genevieve is paying a visit to Lex and reveals she knows that he's employing Jason for his own reasons, and in fact she asked Lex to do so to get him away from Lana. Back at the house, Einstein is wrecking the house, making it tough for the family to keep things from Lois. Clark confronts Lex who reveals his dad was doing experiments with mixing meteor rocks with steroids to enhance dogs. Back at the farm, the brothers turn Hercules loose on Jonathan and Einstein comes to the rescue. Hercules runs off after he hears a high-pitched whistle and Einstein goes off a few seconds later.
Clark and Lois figure out that Zack is involved while Jason confronts Genevieve, who confirms that she set Lana up with him and that their ancestor Gertrude was an enemy of Isabelle, and that Isabelle swore vengeance on Gertrude and all her heirs. Lana overhears this and isn't happy.
Lois and Clark break in to the vet office and figure out they're robbing an armored car. They go to the spot and Clark pinpoints the robbery with his super-hearing. Clark sends Lois off and then gets in the robbers' van and frees Einstein, but accidentally knocks over the kryptonite steroids, leaving him stuck in the van.
The robbers find Clark in the back and prepare to set it on fire. Einstein's follows them and gets Clark out and away from the green-k. Clark knocks the robbers out and Einstein rescues Hercules, who is still in the burning van. Einstein is trapped in the van and Clark rescues him while Hercules gets away.
The doctor gives Einstein a clean bill of health and says he isn't strong any more. Lex shows up, concerned that Einstein is dangerous, but Clark insists on keeping him and names the dog "Krypto." Lana has Chloe look into Jason's background and connects him back to Lana's ancestor Isabelle. Lionel meets with Jason and warns him against Genevieve, then gives him a copy of the map that Lex obtained on the location of the crystal. Clark's parents finally let him keep the dog, and he names it "Shelby" after the dog Martha had as a child.
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