Wait, before you turn away from being disgusted of his face, this friendly humanoid lifeform actually has a very tragic history. In the 42th century, they are being held as mindless slaves by the humans. They don't have names, just something like "Ood 1 Alpha 1".
Ood always carry a small lightening orb wich connects them to a kind of "telepathic field".
After centuries of being enslaved, they finally get rescued by Dr. Who in the episode "Planet of the Ood".
Read more here.
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