Buried alive dating
In a search of the man's identity, they realize he was living a double life with two different families.
In what first appears to be a straightforward case of jealousy and insurance money, new clues send Brennan and Booth in a completely different direction and a third suspect is brought to light.
After Angela is able to identify the deceased boy, Cam quickly assumes the main suspect to be the boy's girlfriend, Kelly, who is a product of the foster system.
It doesn't take long for Brennan to figure out "Cam" is a little too familiar with Booth and they share something of a past.
Also, Booth encourages Brennan to visit her mother's grave site for the first time.
Booth and Brennan investigate the remains of a woman and unborn baby washed up on the beach of the Delaware Bay.
The body is identified as that of Carlie Richardson, a pregnant newly-wed whose mysterious disappearance one year ago had been a major national news story.
The Grave Digger would later return in the fourth season, when the team discovers its identity.