After a violent tremor shakes a Manhattan office building, the sole survivor leads the team to believe he is not from this reality; Olivia must face her mysterious past to save hundreds of people from certain death.
Delilah and Sophie unite over a family emergency. Rome and Regina learn their potential surrogate could be in danger. Maggie and Gary face reality when they attend a 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.