When Simon learns the medevac helicopter has to make a routine supply run, he hitches a ride to the farm he bought from an Afghan family which is en route. Plans go awry when the chopper's pilots spot white tracer fire and they have to make an unexpected stop to pick up an injured US Army soldier with multiple shrapnel wounds. Meanwhile, one of Rebecca's patients -- a Romanian civilian -- suffers a brain hemorrhage and emergency neurosurgery becomes vital to his survival. When Simon can't get back in time to perform the surgery, he must talk Rebecca through the operation via cell phone from the medevac. Bobby and Pedersen evaluate a high-ranking US Air Force officer experiencing *insomnia - the officer has a pending mission that is critical to the Air Force's strategic operations. No time for rest, Marks deals with an overheating CT scanner, an AWOL surgeon and delivering an unfavorable diagnosis.