- last post: 01.01.0001 12:00 AM PDT
The Flood are a race of parasidic creatures who connect themselves to a host and essentialy kill it to use it's body to, ultimatley, reproduce. They are said to have extreme intelligence. Check the HBO story page about the Flood. It will shed alot more light on them than I could.
[Edited on 5/10/2004 3:05:52 PM]