Unidentified Flying Objects streak in from the lunar horizon and the savage noses of SHADO interceptors swing eagerly towards their flight path.

Any error now spelt death to a sleeping earth.

Suddenly the link with Supreme Headquarters, Alien Defence Organization, slides away into a colour-splashed infinity - is Moonbase at the mercy of her enemies...?

Published in the U.S. in 1973 as UFO 2: Sporting Blood.