A woman attempts to kidnap a child she believes is her daughter; while DNA tests are in progress, Benson traces the confusion about the child's origins back to a fertility doctor.
When a Chinese woman's daughter is held for ransom by smugglers, the detectives turn to her sister (Ming-Na) for help.
The son of an outspoken critic becomes the prime suspect when the star of a controversial teen show is raped in her trailer on the set.
Detectives investigate when a baby is left abandoned with a note indicating the mother's kidnapping and quickly learn that she has been kidnapped by a copycat serial killer.
When a missing 16-year-old girl is found in a deserted building, she tells the skeptical detectives that three men in uniform kept her there for several days.
When a missing 5-year-old boy is found dead, suspicion falls on his unstable 13-year-old neighbor, whose mental problems began after he was abused at a camp recommended by the dead child's father.
The detectives investigate a man whose 12-year-old wife is hospitalized with pregnancy complications, and they learn that he is the leader of a cult.
A professor (Billy Campbell) accused of sexual assault volunteers to submit a DNA sample for testing, but the case turns into a he-said, she-said standoff.
Benson and Stabler must rely on a psychiatrist (Mary Stuart Masterson) and her schizophrenic patient to find the man behind a number of assaults on the Upper West Side.
After recovering from being shot during a robbery, Fin returns to the narcotics division to keep a promise he made to locate a missing person.
While examining a 9-year-old girl after a car crash, doctors find that she has been molested and call in Benson and Stabler, who learn that the girl's attacker has killed another child.
A gang member is pushed from a rooftop in what appears to be retribution for a sexual assault, but when the assault victim also turns up dead, the detectives realize the case is far more complicated.
A tip leads Benson and Cragen to the body of a 7-year-old boy, missing since 1980, and the detectives think the new information was a ploy to help the suspected killer, on death row for another murder, delay his execution.
Stabler and Fin investigate the brutal rape and murder of a prostitute, and the prime suspects turn out to be a group of teens suspected of re-enacting a favorite video game.
The detectives discover that a murdered teenage girl was a prostitute and had contracted HIV while working on a pornographic film, which leads them to her killer.
When a wealthy couple laundering money for South American drug dealers is murdered, former ADA Alexandra Cabot (Stephanie March) returns from witness protection to help solve the case.
Stabler struggles to keep his emotions in check as he interrogates a man (Matthew Modine) suspected in the murder of a teenage girl -- a man he once let get away on similar charges.
When a teenage girl disappears, a psychic (guest star Martin Short) is brought into the investigation.
A mother who reported the statutory rape of her daughter is found murdered.
Benson and Stabler have a suspect (Alfred Molina) but not enough evidence when a serial rapist preys on illegal immigrant women, and Tracy Kibre (Bebe Neuwirth) is brought in to work on the case.
Benson and Stabler probe an assault and carjacking, only to find that it is connected to illegal trafficking in painkillers apparently headed by an elderly woman (Melinda Dillon).
The dismembered body of a woman is found in a junkyard, and detectives must determine who killed her and who attempted to harvest organs from her corpse.
When two police officers in separate precincts attack their wives and demonstrate suicidal behavior, Benson and Stabler suspect a malaria drug both men received while serving in a reserve unit in Afghanistan.