When a violent tremor shakes a Manhattan office building and only one survivor is found, Walter surmises that its cause is rooted in his research with William Bell many years ago.
Delilah and Sophie come together during a family emergency; Rome and Regina learn that their potential birth mother could be in danger; Maggie and Gary face a harsh reality when they attend a mutual friend's cancer remission party.
Having gone their separate ways since the series "Beverly Hills, 90210" ended 19 years ago, the cast reunites at a 30th Anniversary fan convention in Las Vegas, causing old flames, feuds and feelings to reignite.
