Prodigious armed robber and expert escaper John Killick escaped custody in three states, once in a helicopter hijacked by his girlfriend. 

Most of the police and prison officers who chased or caged him over more than 50 years are long gone, while John has written five books.

But the brutality of Pentridge has stayed with him.

Killick takes host John Silvester inside the giant bluestone walls that hid callous brutality, resulting in angry men being released back into the community. 

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If you or anyone you know needs support, call Lifeline 13 11 14, Mensline 1300 789 978, or the National Sexual Assault, Domestic and Family Violence Counselling Service on 1800RESPECT (1800 737 732).