Law & Order: Special Victims Unit: Season 2, Episode 19

Parasites

When the remains of a young woman are found buried in an apartment courtyard with a collar and leash, Detectives Benson and Stabler determine that the dead woman is Ava Parulis, a Romanian immigrant who was brought to the United States for an arranged marriage. They discover from Ava's estranged twin, Irina, that the dead woman had left her abusive husband, and made a habit of taking advantage of wealthy suitors.