Episode 511, "Fit For Duty"
SEASON 3, EPISODE 315 - When a young girl is part of a witness protection program that is not able to really protect her or her family, the young girl reaches out to a 911 operator to be her confidant. When the situation turns violent, SRU is brought in to help. The young girl witnessed a murder several years ago, and her mother, father and she have been on the run ever since then. When the murderers come to her house, and shoot her mother, she is on the phone with Kate, the 911 operator. But then they cannot find the girl and her father, who are both very skilled at being on the run. In the end our heroes find the killers, and the mother survives.[Parkers son Dean shows up at work]."