Great Barrier (S04E04)

Zack (Brian Nishii) and Ella (Grace Hsu) are quite ambitious - Ella is posing as an affluent Japanese businesswoman and Zack says he works at Goldman Sachs. They go to a jewelry store and very discreetly swap three diamonds. Zack then mysteriously dies in a subway tunnel as they are making their escape. It seems someone injected him with a lethal dose of muscle relaxant. It's tough to track down Ella - and it turns out Zach was using a fake license. It seems he had been to Japan and showed a Goldman Sachs executive a "good time." Goren (Vincent D'Onofrio) and Eames (Kathryn Erbe) discover Ella worked as a bicycle messenger, with the scrapes, scars and leg muscles to prove it and they track her down. Ella's parents haven't been in touch with her for about a month and are upset because Ella sent a nasty letter to her grandparents informing them her mother decided to have an abortion. In the meantime Ella is casing out yet another jewelry store and the detectives believe she has an older, smarter accomplice. (iTunes)