The investigation is finding out more and more strange things about Lighthouse. We hear what happens when people start to question what is happening. Catrin speaks with Erin who raised concerns about Lighthouse and was accused of being "a cynical little old witch".
Meanwhile Lighthouse is getting increasingly obsessed with its critics and former members.
What happens when a life coach takes over your life? Catrin Nye and her team expose control, intimidation and fear at a sinister life coaching company.
Reporter: Catrin Nye Written by: Jamie Bartlett and Catrin Nye Producers: Osman Iqbal, Natalie Truswell, Ed Main & Jo Adnitt Researcher: Aisha Doherty Executive Producer: Ravin Sampat Sound Mixing: James Bradshaw Original Music by: Phil Channell Commissioner: Rhian Roberts
Archive clips from Stanley Milgram, Solomon Asch Conformity experiment re-enactment, 1974: copyright Alexandra Milgram and Alexander Street.