Filmmaker Louis Theroux joins Larry Williams on the Mike Hosking Breakfast to discuss his new film - an expose on the secretive Church of Scientology.
'My Scientology Movie' covers Theroux's attempts to shed some light on David Miscavige's group, and allegations of abuse and brainwashing among Scientology.
However, he explains Scientologist aren't particularly welcoming to outsiders, especially journalists.
Theroux said during the making the movie he came to realise that "they are genuinely capable of being very nasty, and I've had little glimpses of it, and it's not nice."
"When you feel that you're exposed and they might have something that will make you very uncomfortable in some way, and they use it against you, it can be very frightening."
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