The Greater Good (a.k.a. Sides) - S1-E21
Continuity mistake: When Sayid speaks to CIA Agent Melissa Cole after Essam's death, in the first shot the body laden stretcher is wheeled to the vehicle and the back door is opened. When Agent Cole says, "Plane ticket and walking around money," in the background the stretcher is gone and the door is closed. But when Sayid asks, "What happens to his body?" the stretcher reappears as the body is being put into the open back door. (00:40:40)