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The Flood was a viral species which became trapped inside a glacier on their planet of Mars. The Flood needed a physical form to take on and could infect all biological life containing water.

Biology Edit

The Flood's natural state was in liquid water. It was capable of controlling the water, causing it to flow in unnatural directions. It was also capable of infecting other life forms by coming into contact with them, making them spasm and convulse as they were taken over, mainly because it was a viral life-form.

Once infected, the individual constantly exuded water, pouring from the body; hands and mouth. This could be increased to produce high-pressure sprays from both the hands and the mouth. The infected victims would no longer draw their oxygen from air, but from water and they would be near walking corpses, as the infection greatly weakened their heartbeats and pulse. Also, the infection would cause a lot of electrical activity in the host's brain. Upon mutation, infected victims could deactivate nearby cameras. When infected, the hosts would also develop cracked skin (especially around the mouth and neck) and blackened teeth, as well as an internal fission in the host's body that produced the water. Some hosts, though not all, could develop faded blue eyes. The Tenth Doctor suggested that this might mean they were closer to human than those with the faded blue eyes. These physical symptoms could be masked, meaning that the infection could hide inside a human host, and infect him or her at any moment.

The host also had the ability to survive on the surface of Mars. Hosts could also run extremely fast, even going as far as to keep up with a rocket-powered robot and outrun other running people. A single droplet of the viral water emitted by the host could pass on the infection to another host. Despite the considerable amount of water produced by the infection, the infected did not seem to be overly affected by electricity (which salty water conducts well); The infected Andy Stone was electrocuted by the Tenth Doctor, but was only momentarily incapacitated. However, the Flood creatures, being made almost entirely up of water and constantly producing it, could be destroyed by intensive heat. This weakness was shared with those who imprisoned them, the Ice Warriors. (TV: The Waters of Mars)

The Flood proved capable of coordinated action despite being scattered, as well as considerable intelligence. When infecting Ice Warriors, it could communicate verbally once infection manifested itself. (COMIC: The Wolves of Winter) Alternately, human victims victims could no longer speak English, but could emit gurgling growls and snarls and could seeming only understand Ancient North Martian. All infected could also emit terrifying high-pitched screams that sounded like tortured metal, capable of cracking open ice, and communicating with other infected victims. Strangely, a victim's scream could be heard through the thickest of metals. (TV: The Waters of Mars)

History Edit

At some point relative to the 9th century, a virus the Ice Warriors called "The Flood" was sealed inside a glacier in the Gusev Crater on Mars by the Martians as part of a mission to eradicate the parasite from their planet. By the time they were sealed, one Ice Warrior had become infected and fled in a ship, crash-landing on Earth in the North Atlantic. A group of Vikings, the original Wolves of Fenric, found the crashed vessel, along with the Ice Warrior patrol sent to contain the virus as well as the Twelfth Doctor and Bill Potts.

The Flood proceeded to take many of the Martian and human lives. Fenric, still trapped in the Shadow Dimensions, planned to use the Flood to infect all of the Earth's water in order to control it. When a Haemovore found of this betrayal, it wiped out the Flood strain by detonating a volcano. (COMIC: The Wolves of Winter)

This left the last remaining strain still trapped in the glacier. In 2058 and 2059, the human colony Bowie Base One used the glacier as a water source. (TV: The Waters of Mars)

Original timelineEdit

On 21 November 2059, the Flood managed to infect Andy Stone when he ate a carrot he had washed thanks to a broken filter and the replacements not fitting, let them through into the water supply. The Flood proceeded to overrun Bowie Base One which eventually led to Captain Adelaide Brooke initiating Action Five. The resulting nuclear detonation destroyed Bowie Base One, the surviving crew, the infected personnel and the Flood.

Many on Earth mourned the crew's death but remained unaware of why Adelaide had destroyed Bowie Base One or that it was to stop the Flood from reaching Earth. (TV: The Waters of Mars)

New timelineEdit

In the altered timeline, the Tenth Doctor visited Bowie Base One at the same time that the Flood infected Andy Stone thanks to a broken filter. Reluctantly aided by the Doctor, the crew attempted to battle the Flood. The Flood learned of the abundance of water on Earth through the infected Margaret Cain and expressed a desire to reach Earth in order to spread. As the situation worsened, the Flood-infected Margaret, Andy, Steffi Ehrlich, Roman Groom and Tarak Ital started shattering the ice holding the rest of the Flood in order to release it.

Though the Doctor originally refused to help as the destruction of Bowie Base One was a fixed point in time, he declared himself the Time Lord Victorious and attempted to save Adelaide, Mia Bennett and Yuri Kerenski. With the help of Gadget, the Doctor managed to transport the survivors to safety in his TARDIS. Before departure, Adelaide initiated Action Five which activated a nuclear device under Bowie Base One. The resulting nuclear blast destroyed Bowie Base One, the infected crewmembers and the Flood.

Following Adelaide's suicide on Earth to correct the timeline, Mia and Yuri spread the story of the Flood infection of Bowie Base One and Adelaide's heroic actions to stop them. This inspired Susie Fontana Brooke to lead humanity into the stars. (TV: The Waters of Mars)