The team investigates the grisly crime scene of a murdered family - a grandmother, father, mother, and 8 year old daughter all killed. Morgan Brody, Ecklie's daughter who has moved from Los Angeles, has also officially joined the team. The investigation immediately leads them to their first suspect, John Lee, a peeping Tom pedophile neighbor in love with the little girl. Terrified, John confesses to the crime, but just as the team discovers that the evidence may not quite add up against him, a second person, Leslie Gitig, confesses to the crime, saying that she and the husband were having an affair. However, further investigation of the clues leads the team to discover that the murdered family was not as normal as they seemed - the family was selling drugs from the home. To complicate matters, a third suspect, Maurice Gallows, also confesses to the crime saying that he was trying to protect his drug addict son from the family. Although these individuals seem to be unrelated, Russell comes up with a "Strangers on A Train" theory: although seemingly unrelated, these three people got together to try and plan a perfect murder including throwing off the police by all three giving false confessions.