The star will share his close encounters with investigators in America.
New X Factor judge Robbie is working with George Knapp, of Channel 8’s I-Team, to look at extra-terrestrial goings-on.
Hunt For The Skinwalker probes the strange sightings found on Utah’s 600 acre Skinwalker Ranch, including mutilated cattle and UFOs.
The beings are nicknamed “skinwalkers” by the Native American Ute tribe, a kind of shapeshifter.
“You’re actively hunting it. It will hunt you back”
A source said: “Robbie has had a number of encounters which cannot be explained by conventional science and he has always been very open about them. When his friend George asked him to be part of his film he agreed instantly, he isn’t embarrassed by his belief.”
But Robbie will need to take care.
Jeremy Corbell, tribal police officer at the Ute Indian Reservation, said: “You need to protect yourself. You’re messing with something that’s not good.
“You’re actively hunting it. It will hunt you back.
“It’s powerful, and given the chance, it will harm you. I’ve seen it happen.
“These things will attach to you. They will follow you. This is real.”
Robbie has previously spoken of his spooky experiences.
He said: “I’ve seen stuff that I can’t explain… I’ve had a UFO right above my head, totally sober.”