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.