Aliens, the extra terrestrial kind, when helpful, remote, friendly or in authority signify your guides or guardian angles. They show up as aliens in your dream because you are not quite sure that you are the same as them. When you become more comfortable with the fact that you are, dreams of them as aliens will diminish. The only difference between you and them is their state of awareness and the fact that you currently inhabit a body.
Aliens, when threatening, signify entities such as malicious spirits or illness. Going to bed in an angry mood can trigger dreams where you are fighting off aliens when you end up on a low level of the astral plane.
