07/15/2010 at 12:00 AM EDT
After last night's two-hour, tear-jerking finale
, Grey's Anatmoy
fans are still left wondering what will become of Izzie
And that's the way show creator Shonda Rhimes
likes it. "I don't know that you should be saying 'Which one of them lives and which one of them dies,'" Rhimes says in an interview with EW
. "I know what happens to the characters."
While viewers are left to wonder until next season, Rhimes admits that even the cast is left in the dark about their characters' fates. "There was a joke for a while there that if I got hit by a bus no one would know how to end the season."
But rest assured, season 6 will be another "crazy experiment" filled with ups and downs, twists and turns, and -- who knows? -- possibly even more hallucinations. But don't call it "ghost sex."
"We all thought it was really surprising that anybody thought there was a ghost on our show," Rhimes tells EW
. "We're a medical show. We thought it was surprising that anybody would look at it and go, 'Gee, that's a ghost.'"
And as for Meredith
's Post-It note wedding shocker, "It will have big reverberations next season," Rhimes says.
Another element that will be woven into the storyline will be Ellen Pompeo
. "We're still talking about what we're going to do and what that's going to mean," admits Rhimes. "Ellen is extraordinarily optimistic about what she's going to be able to do." -- Amy Keith Tell us: What are your hopes for season 6 of Grey's Anatomy?