Exact location unknown , somewhere in the Andromeda Galaxy.
Invisible Transferring knowledge to others by touch Healing
Behind the Scenes
Simon Pegg Nick Frost
These unnamed small big headed humanoids, are rare that live somewhere among the Andromeda Galaxy. Although it's never mentioned what they are exactly, however it's implied that they might be Greys, or at least another kind of species that resembles, or might even be related to them.