INTERGALACTIC WAR BRINGS THE LONDON SKIES TO A SHUDDERING HALT!

The day after tomorrow - and the Vrezian Confederacy and the J'arrodic Federation have brought their 'honorable' air-war to Earth.

They're not here to invade, and they're being exceptionally considerate about collateral damage, all things considered.

But human air travel is at a standstill, our culture is collapsing, the skies are clogged with toxic smog... And UNIT can't do a thing, as the aliens vaporize the weapons stockpile of any country that dares interfere!

The deadlock needs a peaceful and clever solution - let's hope the Doctor is up to the job!

And in the middle of it all... Alice is given a shocking offer she dare not refuse!

• New two-part story begins this issue!

• Crucial clues to the arc plot - and the Doctor's hidden enemy!