: George's father, Harold O'Malley, undergoes surgery for esophageal cancer and a heart valve replacement. The entire O'Malley family stays at the hospital, adding pressure on George as he balances his role as a son and a doctor.
: Meredith’s father, Thatcher Grey, visits the hospital for the birth of his new grandchild. This highlights Meredith's ongoing struggle with her abandonment issues and her difficult relationship with her "other" family. [S3E11] Six Days (1)
: Returns as Harold O'Malley, George's father. Jeff Perry : Returns as Thatcher Grey. Debra Monk : Returns as Louise O'Malley, George's mother. Soundtrack Highlights The Best Episodes of Grey's Anatomy Season 3 : George's father, Harold O'Malley, undergoes surgery for
: Following Denny Duquette's death, Izzie receives a $8.7 million inheritance. In this episode, she finally decides how to use it—by anonymously paying for Heather’s expensive surgery. Debra Monk : Returns as Louise O'Malley, George's mother
: A 17-year-old patient named Heather, played by guest star Mae Whitman, arrives at the hospital for a surgery to correct severe scoliosis. Her cynical attitude challenges the interns, particularly Izzie.