An Outlier is a human of importance to the Hosts to be experimented as a biological weapon against their enemies. These people are sequestered and hunted by the Intelligence Directorate, and not allowed to be killed by the drones. There are thousands of people the Hosts seek out, for they need an army to face a greater enemy
. Will Bowman and Eric Broussard are among the people the drones weren't allowed to obliterate. Everyone stored in the pods who were sent to space are part of the Hosts secret army. Outliers hold special skills and are trained from various military groups worldwide.