Talerian

The Talerians are a race of aliens from the planet Taleria.

Biology
Talerians are the same height as humans, but with grey-green skinned blobby bodies, covered in slimy pustules. Their heads are bulbous, with a slit-shaped mouth full of razor-sharp teeth, and a single, egg-shaped eye. They had no necks. Their skin was something akin to rubber, able to deflect small impacts. More powerful strikes, such as that of a knive wound, or a change in atmospheric pressure, would rupture the skin, causing the Talerian's liquid innards to gush out, killing them. With each passing generation, the Talerians grew more and more fragile.

Technology
The Talerians wielded laser blasters capable of stunning or killing. They also wore armor, to protect their frail bodies.

History
A group of Telerians managed to invade Base Diana on the Earth's moon in 2010. This was acheived due to one of their number following an unintentional signal from the mind-altering experiments of Professor Jackson. Taking over Jackson body, the Talerian prepared to use his mind-altering device to transmit the minds of the rest of his kind into the comparatively more robust human bodies, sabotaging the base's quantum displacement system of travel to prevent discovery from Earth authorities. The attempted takeover was stopped by the Eleventh Doctor, who managed to restore the minds of all the humans who had been taken over. Jackson, his mind returned to him, sacrificed his life by shattering one of the base's windows, causing an atmospheric change that ruptured the bodies of the Talerian invasion force. (NSA: Apollo 23)