From the early days working in secret under the command of Brigadier Lethbridge-Stewart to the new, modern UNIT organisation under the leadership of his daughter Kate, this secret history exposes the many threats ranged against our world - and how UNIT has saved humanity time and again.

Carefully curated from the top-secret, maximum-security heart of UNIT itself, this never-before-seen account includes declassified case files spanning five decades, technical schematics of recovered alien technology, previously unreleased press reports and testimony from UNIT personnel who witnessed events first hand.

Featuring plenty of input from the Fifteenth Doctor himself, The Gold Archive stands as the ultimate guide to Earth's invasions.