Plot

Booth and Brennan's next case leads them to a crime scene where a human carcass has literally melted into the dashboard of a charred truck. As the team investigates the case, they discover a gunshot wound in the victim, but learn that neither the fire nor the bullet was the cause of the victim's death. Additional clues lead them to a local high school where the victim's wife is a teacher. As a student-teacher relationship begins to surface and a pattern takes shape in the lab, the team is able to track down the murder weapon and solve the crime. Meanwhile, Sweets resists the temptation of allowing his feelings for Daisy to interfere with helping her pass a government psychological evaluation, and Hannah attempts to break the ice and warm up to Booth's son Parker.—Fox Publicity

Sunrise. A corpse sits in a pick-up truck ... which catches fire and EXPLODES.

Meanwhile, Booth and Hannah discuss the latter's job when Hannah knocks over a picture of Booth and his son. "I told you I wasn't very good with kids," she says. Booth kisses his GF ... and tells her not to worry. He then arrives on the crime scene where Bones is waiting. Amazingly, the skeleton of the dead man appears to have melted. "Bones don't melt," Bones insists. Back at the lab, Camille notices a bullet. The victim was shot in the chest before being burned.

Later, Angela has been able to recover four serial numbers from the burned truck. Booth says it might help identify the victim. Booth then summons Sweets with a problem: his son doesn't like Hannah. "It might take a little time, but I think the three of you will be fine," Sweets says. Warns Booth: "If you're wrong about this, you will pay." Daisy, in the meantime, theorizes that the victim's bones were warped due to a magnesium fire. Hodgins concurs. Booth then visits a body shop in search of Jessie Wilson. "We found a burnt truck registered to your company's name," Booth explains. Jessie says the truck, which was filled with magnesium, was probably driven by an employee named George, who had "money problems."

Booth theorizes that George stole magnesium from Jessie -- and that Jessie shot him. Jessie, of course, denies everything. "We've been friends since high school," Jessie says. Back at the lab, Daisy notes that the bullet only penetrated a few millimeters -- meaning that the cause of death was not a gunshot. B&B then head to a local school, where the wife of the victim teaches. Booth recognizes a student from the chop shop and urges Bones to speak with him ... but Randy charges out of the room. Booth, meanwhile, breaks the bad news to wife Cathy, who had taken out a life-insurance policy on her husband just one week before his death. Cathy, of course, denies any ill intentions.

Later, Hannah visits Booth, who suggests that his GF meet his son. Hannah is nervous ... but agrees. "What if he hates me?" she asks. Cathy, meanwhile, is questioned by Sweets. The woman bought "Star Wars" merchandise online at hugely inflated prices. Why? Turns out Cathy bought all her items at inflated prices through the same merchant -- a seller named "Vader649." The seller is soon identified to be one of Cathy's students, a troubled case named Paul. "She was paying for something else, wasn't she?" Sweets asks. He then adds that the FBI believes the money was payment to kill the victim.

Cathy then admits that Paul was blackmailing her. Turns out Paul found out that his teacher was cheating on her husband -- and demanded cash to keep quiet. So who was Cathy sleeping with? "It was one of my students," Cathy admits to Sweets. That student: 17-year-old Randy. The woman sobs, but Sweets has no sympathy. Angela, meanwhile, uses an ancient mathematical equation to "straighten out" the bones (digitally, of course). It reveals that the victim was likely stabbed in the mandible.

Booth then introduces Parker to Hannah, who struggles to make conversation with Booth's son. Hannah then asks Booth for some private time with Parker. "Maybe you hate me a little ... or even a lot," Hannah says. "I might be trying to steal your dad." Parker appreciates the straight talk ... and peppers Hannah with a number of questions (some more personal than others). She answers them all -- and the two appear to bond. Booth, who is watching from a distance, smiles. He is relieved.

Later, Booth tells Bones about Parker's warm reception ... and the scientist appears somewhat disappointed. She clearly is a bit jealous. B&B then search Randy's locker and discover a giant knife. Sweets then questions the lad, who claims to have no "deeper feelings" for his teacher/lover. His cell-phone records contradict that statement, however. "She loves me too!" Randy cries. "She would have left him!" He claims to have been at home when the victim was killed.

And he's probably telling the truth. Hodgins discovers that the knife wound on the victim's mandible was made by a knife that had been laminated in silver -- unlike Randy's big slicer. Hodgins then explains that Hitler had sliver-coated blades made for his high-ranking officials ... and that these blades were coveted by U.S. soldiers during and after the war. It just so happens that Jessie's grandfather was a soldier during WWII. Did the knife belong to the victim's boss?

So Bones heads back to the chop shop, where Jessie explains that the knife was stolen from the garage some six months ago. He reported it to the police and has always suspected Randy's "on again, off again" girlfriend, who Bones met earlier while attempting to interview the teen. B&B bring Amber to the crime scene. "We know it was you," Bones says. Amber admits to pawning most of the Nazi paraphernalia, but holding onto the knife. It then becomes clear that Amber hoped George, upon learning of his wife's behavior, would be angry enough to kill his wife, thus returning Randy to Amber. When George didn't fly into a murderous rage, Amber tried to have sex with George, who refused her. "You just went bonkers and stabbed him with the knife," Booth says. Hisses Amber: "Even if you can prove it, I'll be out in a year tops. I'm just a kid."

B&B can't argue. Later, they retire to the diner, where Hannah and Parker soon join them. The two have spent a great day together at the zoo. "You're amazing," Booth tells his GF. Bones can only watch ... and wistfully at that.