First Mentioned In:

Terror of the Zygons


Zygon: When Being You Just Isn’t Enough


The home planet of the Zygons was, by some accounts, called Zygor, (The Bodysnatchers, When Being You Just Isn’t Enough) although others indicate it was nameless. (Zygon Stats) It was known to be warmer than Earth and covered in water, which was in the form of lakes with a different mineral composition than those of Earth. There were also no icecaps on the planet. Native lifeforms of Zygor included the unaltered Skarasen and the Zygons. (Terror of the Zygons)

At some point, Zygor was destroyed in a stellar explosion. (Doctor Who and the Loch Ness Monster) In the 20th century, Broton said his world was destroyed in a “recent catastrophe “, (Terror of the Zygons) although his conception of time was unconnected to the human time-scale. (Doctor Who and the Loch Ness Monster) According to one account, the planet was destroyed because of the Zygon war against the Xaranti. (The Bodysnatchers) Another account, given by Elizabeth I who had been posing as a Zygon in 1562, said that the Zygons lost their world when it burned in the first days of the Time War. (The Day of the Doctor)

Many Zygons were able to escape Zygor’s destruction. They were forced to become nomadic refugees searching for a new planet. (The Bodysnatchers)

Four groups of Zygons attempted to make Earth more like Zygor: those who arrived in the 12th century, (Terror of the Zygons) those that arrived in the 16th century and plotted to invade in the 21st century, (The Day of the Doctor) those that arrived in 1909, (Sting of the Zygons) and those that arrived in the late-20th century. (Zygon: When Being You Just Isn’t Enough)

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