Bones Season 1 Episode 22

Brennan receives some bones that she must identify, but is stunned when she finds that the remains are those of her mother. Brennan is hit hard by this discovery, and understandably so, since she never knew what happened to her parents after they disappeared 15 years ago. An investigation is opened by Booth into the case, for the first time ever. Brennan is shocked with evidence that her parents might not be the people she thought they were, and she must come to grips with these new details from her parents' past as well as her own.