S9, E3: When 15 year-old Shane Mills (guest star Kyle Gallner) is diagnosed with a sexually transmitted disease, he claims he caught it from his teacher, Sarah Trent (guest star Melissa Joan Hart) who supposedly seduced him. Sarah argues Shane raped her. Detectives Olivia Benson (Mariska Hargitay) and Elliot Stabler (Christopher Meloni) search further into both Sarah and Shane's lives and uncover some dark secrets.