Showbiz
Rex Features
The popstar teamed up with regular documentary maker Jon Ronson to record the show in Los Angeles and at a UFO conference in Laughlin, Nevada, earlier this year.
According to the BBC, Williams approached the broadcasters suggesting the subject as an idea for a documentary.
The programme will be called Robbie Williams and Jon Ronson Journey to the Other Side and will air on May 6 at 6.30pm.
It was reported last month that the former Take That singer was looking to invest in a £2.5 million observatory in Arizona.
More: Robbie Williams, Showbiz
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