Quatermass's Martian from Q by A Bestiary of Imaginary Beings

In the 1958 BBC television production of Nige Kneale's 'Quatermass and the Pit', workmen excavating a site in London discover what at first appears to be an unexploded bomb. Professor Quatermass, head of the British Experimental Rocket Group, becomes involved when it becomes apparent that the object is an alien spacecraft.
The main interior of the ship is empty, and a symbol of six intersecting circles is etched on a wall that appears to conceal an inner chamber. This chamber contains the corpses of three-legged, insectoid creatures with stubby antennae on their heads giving the impression of horns. An examination of the creatures' physiology reveals they came from Mars. The ship and its contents have a powerful and malignant influence over many of those who come in contact with it, causing a wave of mass violence.

Previously unreleased remix of Laughing Dark's 'Space Television'.

https://laughingdark.bandcamp.com/album/the-edge-of-space.

Please note that bordering on individual letters indicates that beings are contained within.

Imaginary Beings