Imagine an audience that does not just clap politely, but jumps onto the stage, rewrites the ending of the play, and then sees that new ending drafted into legally binding city law. It sounds like science fiction. One man actually made it real, tearing down the wall between the stage and the seats and turning theater into a weapon for social change.

We trace the extraordinary life of Augusto Boal, the Brazilian dramatist and activist who was kidnapped, tortured, exiled, and then returned home to get elected to public office. His story is a war against walls, both literal and metaphorical, and a blueprint for handing everyday people the tools to rewrite their own lives.

• How he subverted Stanislavsky and Brecht to serve the Brazilian working class instead of importing 'theatrical colonialism'
• The invention of the 'spect-act ...