Television: Babylon 5

Babylon 5 was a Sci-Fi series that took place in Earth's far future. Humanity had explored our solar system and colonized Mars. One of the first alien races they contacted where the Centauri, from Alpga Centauri. Over the years they encountered many other species as the Earth Alliance explored the galaxy (sounds like Star Trek already???). Well as the series progress you encounter a variety of Alien races, most of them typical sci-fi races.

However in Season 2, Episode 11, we are intorduced to a race called the Streid. These alien species have a habit of abducting individuals and testing them for there strengths and weaknesses. They kidnapped Capt. Sheridan and put him through a number of physical, mental, and social tests. They are very cold and callous.
They Streib are basically the "Greys" and named in homage to Whitley Steiber, who wrote the book "Communion".

In later episode we find and other race known, known only as the "Shadow Surgeons". Although there race was never mentioned we do have reference that the Streib, along with two other race, are allied with the shadow.

Besides the standard parody of the "Greys", there is also another creature known as a Trakallan. N'Grath was one of the only species of his kind encountered on the show. He was the crime boss of the station. What is curious is that the Trakallan resemble the giant insects that are often seen with the "greys".