As serial killer Matthew Brodus (guest star Nick Chinlund) awaits his imminent execution in three days, Detective Stabler (Christopher Meloni) races against time to determine if the convicted man also murdered and raped another victim whose assailant was never identified -- thus giving the slain woman's parents (guest stars William Hill and Laura Hughes) a measure of closure. But Stabler, his former partner and a sympathetic Dr. Huang (B.D. Wong) have just 72 hours to prove once and for all that Brodus was also responsible for the tragedy that overcame the victim's family. Mariska Hargitay, Dann Florek, Richard Belzer, Ice-T and Stephanie March also star.