Season 12, Episode 24
In the 12th-season finale, a rape-trial witness is murdered before she's able to testify, so Benson and Stabler look for links between her homicide and the rape case and uncover some surprising relationships.
Season 12, Episode 23
A woman discovers a naked teenage boy---whom she doesn't know---asleep in her bedroom, and the boy's overprotective mom (Rita Wilson) defends her son's devious actions. When police investigate, they're reminded of how misleading appearances can be.
Season 12, Episode 22
A woman (Lori Singer) is questioned by police after her newly adopted baby is found alone on a playground. Detectives then investigate her fiancé (John Stamos), a man with a sinister past who's also dating the baby's nanny.
Family vengeance factors into a rape case in which both the cops and the suspect seek outside help: ADA Casey Novak (Diane Neal) returns to help police, while the accused man recruits his cousin, L.A. DDA Jonah Dekker (Terrence Howard), to defend him.
Season 12, Episode 20
A young girl's body is found with a doll left as a totem, so police retrace her last steps, which included a lesson with her piano teacher (Elizabeth Mitchell). They then seek help from a psychologist (Jeremy Irons) who decodes the meaning of the totem.
Season 12, Episode 19
A family man's stabbing leads to the exposure of his secret pastime at a swingers' club. Benson and Stabler then go undercover at the club, where they encounter a flirtatious woman (Rose McGowan) with a possessive boyfriend.
Season 12, Episode 18
An art patron (LuAnn de Lesseps) finds a body, and when detectives question the murdered woman's good friend (Kate Burton) and associates, they uncover an antagonistic work environment filled with grown-up bullies.
Season 12, Episode 17
The TV host (Debra Messing) of a show that spotlights predators receives threats to her safety, and this reawakens her hunt for her sister's abductor. An ADA with connections to the TV host then assists detectives in their investigation.
Season 12, Episode 16
After a sexual assault is broadcast on a college's intranet, Stabler and Fin look for the people involved. During the investigation, the attacker's attention-seeking motives come to light.
Season 12, Episode 15
A billionaire (Colm Feore) becomes a suspect in a sexual-abuse case involving a teenage girl, and his highly paid attorney (Robert Klein) is able to make the case veer off course.
Season 12, Episode 14
Benson partners with a female detective (Shohreh Aghdashloo) to investigate a DA's murder, and evidence of crime-scene tampering is found. The case then leads Benson to seek help from an assistant U.S. attorney (Gloria Reuben).
Season 12, Episode 13
A woman (A.J. Cook) is raped by a masked man and her partner is severely beaten by him. The injured woman's estranged father (Jeremy Irons) is notified of the incident, and when police question him, they find themselves confronting an uncooperative man with a sordid past.
Season 12, Episode 12
A woman (Taryn Manning) is attacked in her apartment, and detectives must ask her to revisit her painful buried past in order to solve the case.
Season 12, Episode 11
A young boy is found beaten to death, and the case leads detectives to uncover a gambling ring as well as evidence of a wife (Drea de Matteo) being abused.
Season 12, Episode 10
Season 12, Episode 9
Stabler speaks at a Take Back the Night rally at his daughter's college campus, and the rally inspires a woman to accuse a fellow student of rape. Stabler and Benson then investigate the case, and ADA Paxton (Christine Lahti) is assigned to prosecute it.
An FBI agent (Marcia Gay Harden) is raped while working undercover, and she asks Benson to have her rape kit tested. She then quickly resumes her work to preserve her cover, and only reluctantly allows detectives to become involved in the case, which on the surface involves a protest of a mosque at Ground Zero but really is much bigger.
Season 12, Episode 7
An environmentalist's body is found at an industrial laundry plant, and the investigation puts Benson and Stabler in danger. After more victims are uncovered, Benson unexpectedly reflects on her past while bonding with a victim's daughter (Maria Bello).
Season 12, Episode 6
Two men (Michael Gladis and Kevin Alejandro) are beaten and branded on their chests. After a suspect is found, surprising memories emerge that cause a shift in the case. David Alan Grier and Jason Wiles also guest star.
Season 12, Episode 5
A woman's body is found in a fountain, and soon it's discovered that she ingested toxic mushrooms. The investigation yields a prime suspect (David Krumholtz) who's a professor and an aggressive activist.
Detectives investigate a teenage girl's death and discover that she was a victim of human trafficking. They then seek help from a friend (Gloria Reuben) at the U.S. attorney's office. Meanwhile, Cragen is displeased with his precinct's building decay.
Season 12, Episode 3
A woman (Jennifer Love Hewitt) objects to having a rape kit done after she is raped repeatedly by the same man. Benson then learns that some precincts don't even process their rape kits, but an L.A. detective (Skeet Ulrich) is able to help with the case.
Season 12, Episode 2
A cleared suspect (Henry Ian Cusick) from a prior case helps detectives with a rape case involving a young girl, but he pushes the limits with his assistance.
Season 12, Episode 1
A 10-year-old girl runs away from her adoptive parents (Joan Cusack and Peter Strauss) and is found with a man (Henry Ian Cusick) who denies any wrongdoing. Detectives then learn that the girl's parents are hiding something about their past.