Zygon invasion of Earth
From Tardis Wiki, the free Doctor Who reference
The Zygons attempted an invasion of Earth after their homeworld was destroyed in the first days of the Time War. (TV: The Day of the Doctor [+]Loading...["The Day of the Doctor (TV story)"], PROSE: The Day of the Doctor [+]Loading...["The Day of the Doctor (novelisation)"])
History
Aftermath and legacy
- Main article: Operation Double
