"Blood and War" shows how blood science was accelerated by the needs of the battlefield. This episode journeys from the Spanish Civil War, the first time blood was collected, refrigerated, and carried onto the battlefield, to World War II, when the expectation of tremendous casualties inspired a massive blood drive effort. The stories of Dr. Charles Drew, an African American who headed the Plasma for Britain campaign, but was legally barred from donating blood in the U.S.; Sir Marmaduke Hussey, a W.W. II soldier saved by a blood transfusion; and Dr. Janet Vaughan, who ran a blood transfusion service out of a London pub, are the elements of RED GOLD's second installment.