Gareth, Stacey and Nathanial Train had descended into a world of paranoia and conspiracy, experiencing a shared psychotic disorder; Folie à troix, “madness of three”.

This is the assessment of one of Australia’s leading forensic psychiatrists who, after dissecting their upbringing, communications and relationships, has delivered a deep and comprehensive analysis of the Train’s mental state, concluding they were experiencing “identical persecutory and religious beliefs and delusions”. 

In this episode we hear how Gareth's diagnosis may stem all the way back to birth, how this delusional disorder evolved and how he was able to transfer his delusions to his wife and brother, as he revealed his 'Grand Opus' - ultimately leading them to believe the police were devils, and that they must fight to the death to reach religious salvation.