In this Dateline classic, when a young woman disappears following a chance encounter with a stranger on a train, her desperate family hires a dream team of detectives to follow the mysterious trail she left behind. Keith Morrison reports. Originally aired on NBC on October 7, 2011.

Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.