Grey alien

Biology
The Grey aliens were short and grey, and had a humanoid appearance. They had large heads and eyes, which had milky star-like matter inside them instead of pupils. (DW: Dreamland)

Technology
Grey aliens had complicated Spacecraft. (DW: Dreamland)

History
The Grey aliens were peaceful people, on the brink of war with the Viperox. They sent and ambassador, Seruba Velak, to broker a treaty with the Viperox, but she was shot down by pirates and crashed on Earth. She was kidnapped by the United States of America military and taken to a secret base called Dreamland. The Viperox then decalared a war, which happened on the Grey's homeworld. Seruba's lover, Rivesh Mantilax went after her. It is unknown what the current status of the war is. (DW: Dreamland)

Trivia

 * The design of the Gray Alien mirrors the classic look of aliens that were common in 1950's popular culture (along with Area 51 itself) and many people claimed to be abducted by them.