A young paramedic (Kyle Chandler) arrives at Seattle Grace with a live, unexploded bazooka shell lodged inside a patient’s body. The patient, Hannah (Christina Ricci), had been handling the shell when it partially discharged. Any sudden movement or attempt to remove it could trigger an explosion.
“It’s the End of the World” (Season 2, Episode 16) and “As We Know It” (Season 2, Episode 17) — often treated as a two-part event. grey's anatomy bomb episode
Here’s a summary and key details about the famous “bomb episode” from Grey’s Anatomy : A young paramedic (Kyle Chandler) arrives at Seattle