This week on Four Corners, British filmmaker Ben Zand takes us into the dark world of Incels – a radical online subculture of young men who rage against women for supposedly denying them sex and then turn that rage into fantasies about horrific violence.

Zand uncovers the shockingly violent content that is being shared online and talks to the men behind it, in an effort to understand the Incel mentality that has in part lead to hate crimes and in some cases mass murders.

The film also explores the intersection between loneliness and young men's vulnerability to online radicalisation – a practice known as black pilling. This culminates when Zand accompanies one young man to a bar to meet and talk to a woman for the very first time.

In this episode of Four Corners "Gaming The Games", an investigation by Hagar Cohen, uncovers a scandal that goes to the heart of the Paralympic Games.

The Paralympics have become the world's third biggest sporting event, generating tens of millions of dollars in revenue and sponsorships.

Reporter Hagar Cohen speaks to former athletes and high-ranking officials who tell her the system that's meant to ensure a level playing field for Paralympians, is flawed and easily manipulated.

The insiders describe a culture where classification rules are regularly bent and broken, with few repercussions.

They fear that without substantial reform, athletes who follow the rules will continue to be robbed of the chance to compete and win.