Peter "Hopper" Stone/ABC via Getty Images
2 of 21
Episodes: "It's the End of the World" and "As We Know It"
Ricci's Hannah has the misfortune of being the girl with her hand on a bomb — before Meredith is. To stop a patient from bleeding out, she places her hand inside him, not knowing that he had a homemade bazooka shot into his body. Unable to move as the bomb squad strategizes, Hannah has a breakdown and runs out, leaving Meredith to take her place.