This episode is about a power outage. In order to prevent any concern that we may be experiencing technical impairment, here is an outline, act by act, of how this effect is accomplished creatively. Teaser: Lights go out briefly in EL train, then return. Act 1: Lights go out briefly in trauma room, then return. Act 2: Toward end of Act 2, power goes out all over the hospital. The lights stay out until the middle of Act 4. Act 3: Lights are out through entire act. Act 4: Lights are out until middle of the act.