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.
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Cast of episode
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- Dr. Cristina Yang
- Dr. Arizona Robbins
- Dr. Alex Karev
- Dr. Meredith Grey
- Dr. Teddy Altman
- Dr. Jackson Avery
- Dr. Lexie Grey
- Dr. Derek Shepherd
- Dr. Mark Sloan
- Dr. Callie Torres
- Dr. Miranda Bailey
- Dr. April Kepner
- Dr. Owen Hunt
- Henry Burton
- Dr. Richard Webber
- Dr. Robert Stark
- Marty Hancock
- Mrs. Swork
- Mrs. Sturgeon
- Jill the Paramedic
- Ray the Paramedic
- Paramedic Brett
- Paramedic Grace
- Chuck Fowler
- Nurse Ruth
- Nurse
- Reporter
- Passerby
- Justice of Peace
- College Student