ABC has presented the press release for the first new episode of Grey’s Anatomy of 2011, “Disarm.” The episode features Arizona’s return to Seattle Grace Mercy West and is written by Krista Vernoff, who last penned the season’s opener, “With You I’m Born Again.”

“Disarm” – News of the incoming mass causalities after a gunman opens fire at a local college hits the staff hard when they must spring into action, even while their own wounds are still fresh; and Arizona does not receive a warm welcome home at the hospital, on “Grey’s Anatomy,” THURSDAY, JANUARY 6 (9:00-10:01 p.m., ET) on the ABC Television Network.

“Disarm” was written by Krista Vernoff and directed by Debbie Allen.

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