A Random

SCIFI.radio story

Earth is attacked by fleets of cats in flying saucers who want to plug us into a power grid and use us as living batteries even though they can all do credible singing impressions of Ethyl Merman and might be overpowered by a bunch of Elvis impersonators , but scientists create a new weapon which turns them into weird rocks.
The End.but they die from catching the common cold.
The End.