This entry may be too late for some folks, as I Tivo'd the program some time ago, and only watched it Wednesday night.
Bits I found of particular interest:
-Charles Drew, the first African-American to graduate from Columbia med school. He pioneered the use of blood plasma instead of whole blood...but because of his race he was prevented from donating blood to the Red Cross(and from joining the AMA, despite his medical & research achievements). Finally, in 1941, the War Department (for whom most blood was collected) began allowing blacks to donate blood, but the supply remained strictly segregated.
-Early practices, including bloodletting and cupping.