Horizon looks at the knowledge gained following the Spanish Flu Pandemic of 1918.
From Here to Infinity
Pandemic
Elephants or Ivory
Electric Heart
Sudden Death
New Star in Orbit
New Asteroid Danger
Skeleton Key
Wings of Angels
Mistaken Identity
Volcanoes of the Deep
Anatomy of an Avalanche
The Midas Formula
Blood and Flowers: In Search of the Aztecs