"2"^^ . . "I Am a Tree"@en . "2006-09-28Z"^^ . . . . . . . . . . . . "\"I Am a Tree\" is the second episode in the third season of the American serial drama television series Grey's Anatomy, and the 38th episode of the overall series. The episode focuses mainly on Cristina Yang (Sandra Oh), as her romantic relationship with Preston Burke (Isaiah Washington) is tested through the arrival of his parents. The episode is the first to feature Diahann Carroll, who begins a recurring role as Jane Burke, Preston's mother."@en . "3"^^ . . . . . .