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S9 E2: Kristi McGarrett (guest star Liza Joyce) is raped by her sister's boyfriend, Dan Friedich (guest star Ryan Lynn), while her sister Rachel (guest star Christina Brucato) goes missing. Friedich remains a suspect, while Detective Benson (Mariska Hargitay) and Stabler (Christopher Meloni) use Rachel's "avatar" (screen persona) to track down the kidnapper before time runs out. Also starring: Adam Beach, Dann Florek, Ice-T, Diane Neal, and Tamara Tunie.