This 2 1/2 hour interview with Jim Sparks details his eighteen years as an alien abductee / experiencer. Sparks, whose conscious recall experiences are documented in his book, THE KEEPERS, explained that he initially resisted being abducted, but gradually shifted into a mode of cooperation.
He had experiences with two types of Grays; one type he referred to as "true" Grays that were biological beings. The other type of Gray, a shorter entity known as a "worker," was half-robotic, he said. Interestingly, Sparks claimed that the aliens' harvesting of human reproductive material is used to make the worker Grays.
One of the key messages they shared with him: humanity is killing the Earth via environmental damage, that we must change our ways if future generations are to survive on a planet worth living on.
Sparks said he's also had encounters with "Reptilians," some of whom are 9-10 ft. tall, with red pupils and a over sized brain, housed in a skull that hangs out over their eyes.