AFTER A HEARTSTOPPING CLIFFHANGER, SEASON SIX OF "GREY'S ANATOMY" OPENS WITH TWO BACK-TO-BACK EPISODES ANSWERING THE QUESTION OF WHAT HAPPENS WHEN SEATTLE GRACE LOSES ONE OF THEIR OWN Jessica Capshaw ("The Practice") Returns as a Series Regular "Grey's Anatomy" returns for its sixth season with a two-hour event on THURSDAY, SEPTEMBER 24 (9:00-11:00 pm, ET) on the ABC Television Network. In the first hour, entitled "Good Mourning" (9:00-10:00 pm), the hospital staff is left to deal with the ...