When seventeen year-old Andrea McWilliams is found strangled and beaten to death in an alley, her ex-boyfriend leads the cops to a website that McWilliams used to meet up with random men . Detective Olivia Benson (Mariska Hargitay) decides to create a user account for the site and finds womanizer Peter Butler (guest star Brian Geraghty), the man who met up with McWilliams. The case is closed when a different suspect is proven guilty of her murder, and a new one opens when McWilliams rape kit tests positive for HIV. Not only is HIV spreading as a result of countless attacks, but now the detectives must also catch a rapist on the loose

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After learning Auggie’s (Colin Egglesfield) blood was on Sydney’s (Laura Leighton) murder weapon, the police search his apartment and demand the other residents tell them where he went. Riley (Jessica Lucas) is conflicted about whether to help the police, but Jonah (Michael Rady) pushes her to make the call as she knows where Auggie is staying. Meanwhile, a work incident causes Jonah to pretend he’s engaged to Ella (Katie Cassidy) who really gets into the role playing. David (Shaun Sipos) arranges a secret play date with his little brother Noah (guest star Cameron Castaneda) but after the little boy hurts himself, Lauren (Stephanie Jacobsen) must come to the rescue and risk the wrath of Dr. Mancini (Thomas Calabro). Ashlee Simspon-Wentz also stars. Liz Friedlander directed the episode written by David Babcock.

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Navid and Gia (guest star Rumer Willis) launch an investigation into student drug use at West Beverly for Blaze News, which leads them to Annie’s boyfriend, Jasper, leaving Annie torn over who to believe.

Fresh off his break-up with Adrianna, Navid receives dating advice from Samantha Ronson (appearing as herself) while out with Liam, Teddy and Ivy (guest star Gillian Zinser) at the Edison.

Worried that Adrianna will relapse, Naomi and Silver enlist Navid’s assistance. Dixon reveals his situation with Sasha to Debbie and Harry, prompting Debbie to do some investigating.

Jen and Ryan meet up with Pharrell (appearing as himself) to watch a performance of N.E.R.D.

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