Colony is an American science fiction drama television series created by Carlton Cuse and Ryan J. Condal, starring Josh Holloway and Sarah Wayne Callies.

The Authority serves an extraterrestrial group referred to as the "Hosts", about whom little is known until later in the series (an alien robotic race finds itself hunted, who came to Earth to use humans as allies and labor in their own battle).

The Authority enforces Host policy via militarized police called Homeland Security and nicknamed the "Redhats" for the red helmet cover of their otherwise black tactical attire.

One of these walls, 20 to 30 stories tall, many meters thick and many miles in length, surrounds the central part of Los Angeles, where the series is set.

Traffic passes through the walls at heavily secured checkpoints, called "gateways", which allow the Authority to strictly control the movement of people and the distribution of consumables, such as food and fuel, which are rationed.

The ruling forces maintain control through the separation of family members, shoot-on-sight curfews, forced disappearances, random checkpoints, frequent electronic identity checks, limitation of motor vehicle usage (most people walk or ride bicycles), pervasive visual propaganda, slave labor in a place called the "Factory" (later revealed to be located on the Earth's moon to mine radioactive materials), and massive continuous electronic surveillance with both hidden cameras as well as Host-provided drone aircraft that launch from hangar bays inside the wall and capable of killing humans by extremely lethal high energy weaponry.

The father, Will Bowman, is a former FBI agent and retired Army Ranger who reluctantly joins the Redhats (humans collaborating with the aliens) and is tasked with tracking down members of the Resistance, after being threatened that he and his family would be sent to "the Factory" if he did not comply.