S1·E4 Little Miss Lost

Paul is shaken when a bus explodes after he sees the visage of a young girl aboard. After the tragedy, Paul learns that the unidentified body of a small girl is being held in the local morgue. The body is amazingly without any scars or evidence of the explosion, although he is certain that she is the girl he saw. Soon another disaster occurs, also accompanied by a vision of the girl and another identical unclaimed body. After further visitations and tragedies, Paul realizes that the girl's ghostly appearance is causing these catastrophes and he searches for a way to placate the disturbed spirit. The investigation leads the team to Rosanna Wye, the now aged mother of the young girl. The telling of her story and their ultimate reunion finally puts the little girl's spirit to rest.