Season Two of Grey's Anatomy picks up exactly where Season One left off, with the unexpected arrival at Seattle Grace Hospital of brilliant surgeon Addison Shepherd (Kate Walsh)--much to the dismay of Addison's estranged husband Dr. Derek Shepherd (Patrick Dempsey), to say nothing of Derek's current amour, surgical intern Meredith Grey (Ellen Pompeo). Naturally, Meredith feels betrayed by Derek, and keeps on feeling that way throughout the rest of the episode. Meanwhile, chief of surgery Dr. Webber (James Pickens Jr.) recovers from his operation with the special help of intern George O'Malley (T.R. Knight), who has been appointed official bearer of gossip from the hospital; and Meredith's friend and coworker Cristina Yang (Sandra Oh) has big news for her boss Dr. Preston Burke (Isaiah Washington)--and vice versa. Finally, arrogant intern Alex Karev (Justin Chambers) displays a hitherto untapped streak of compassion when the team's favorite bartender Joe suffers a heart attack. ~ Hal Erickson, Rovi