Barbara Barrie

Police responding to a shooting find a dead teenager, who's filthy and appears to be homeless. She's also been shot and Detectives Benson (Mariska Hargitay) and Stabler (Christopher Meloni) are concerned that one of the cops shot her by mistake. Even though the bullet hit the teen, she was already dead. She is identified as Samantha Tassler, a black teenager from a well-to-do family outside of Philadelphia who disappeared almost a year ago. She is wearing an unusual necklace, of the infinity sign, and they trace the custom piece of jewelry to Dr. Garrett Lang (Gale Harold), who had multiple copies made. Dr. Lang is quite charming, and he runs a clinic that specializes in hormone replacement and perpetuating youth. Suspicious of Dr. Lang they sift through piles of his records, and in the process Detective Munch (Richard Belzer) discovers he owns an office building and three brownstones. It seems Dr. Lang applied for tax-exempt status for one of them, and they find out he claimed it as a charitable organization. The Detectives decide to check out the "Foundation for Knowledge Expansion".

Post-birthday party, Fiona busts her lip open on her cast, and Dr. O’Hara and Jackie stitch her up in the Peyton kitchen. Jackie notices Sarah Khouri’s philandering behavior and brings up her concerns to Dr. O’Hara. Libby Sussman (BARBARA BARRIE), the über-patron of All Saints, is brought into the ER. Before she can make good on the threat to pull her funding, she dies. Unnerved by Dr. O’Hara’s relationship, Jackie tells Eddie she needs time to reconsider their relationship – Jackie’s quality time with Kevin turns into a huge fight.

Lonely old women are being strangled, and Chief Ironside believes that there is more to it than just a serial killer at work. Setting Eve up as a potential victim requires a little ingenuity, but it might just prove to be worth the effort.

Amy goes off to work, leaving Helen alone with her thoughts and memories--including those of her late husband Jim. At the grocery store, she runs into old friend Carol, whose husband used to work with Jim, and endures the prerequisite showoff of pictures of children and grandkids. Later, Levi stops by to drop off a photo album--and ends up venting about Helen's role in his breakup with Amy.

Several jockeys are trampled to death, supposedly by the ghost of a long-dead rider, John Joseph Jacobs (Hamish Linklater - "The New Adventures of Old Christine"), and his spooky horse. Since she was a jockey before working at The Pie Hole, Olive hires Ned and the team to investigate. Meanwhile, Ned finds himself haunted by the ghosts of his own past as Halloween nears. Guest star Barbara Barrie ("Suddenly Susan," "Barney Miller") appears as Mamma Jacobs.