9. “Random Acts”-Season 3-Greene (Anthony Edwards) is confronted by the brother of a man who died under his watch.

8. “Rampage”-Season 7-The victims of a rampaging gunman are brought in the E.R. However, Weaver (Laura Innes) outs herself during a confrontation with Romano (Paul Crane).

6. “I Don’t”-Season 13-On-again/off-again couple, Abby (Maura Tierney) and Luka (Goran Visjic) finally tie the knot. Unfortunately the episode ends with Ray (Shane West) being hit by a car. (Photo: Everett Collection)

5. “Hell and High Water”-Season 2-During a massive storm Ross (George Clooney) fights to free a trapped child. After this episode Clooney heads into the stratosphere. (Photo: Everett Collection)

4. “Chaos Therory (aka Unknown Origin)-Season 9-Romano (Paul McCrane) throws yet another temper tantrum, however, this time he backs into the tail of a helicopter.

3. “The Letter”-Season 8-In his final days Greene (Anthony Edwards) moves to Hawaii to be with Elizabeth (Alex Kingston) and his daughter. A letter is delivered to the E.R. confirming Greene’s death.

2. “Be Still My Heart”-Season 6-Carter (Noah Wyle) brushes off Lucy (Kellie Martin) when she asks for help with a patient. The unforgettable final minutes, Carter and Lucy are brutally attacked and left for dead.