Sam Holcroft's play Cockroach depicts a world infected by violence, exploring Darwin's theory of evolution and the apparent male propensity for war. It was first performed at the Traverse Theatre, Edinburgh, on 23 October 2008, in a co-production with the National Theatre of Scotland.
The play is set in a classroom in a seemingly normal modern-day comprehensive school. While Beth, the teacher, instructs the unruly pupils in the principles of natural selection, the boys are being called up to fight in some unspecified conflict that rages on in the world outside. Beth believes that only education will set her pupils free, but, despite her best efforts, the tide of conflict is soon lapping at the school gates. One by one, pupils and teacher are pulled under as their hopes and dreams float away from them. In a central recurring image, the girls clean the torn and bloodied uniforms of dead soldiers.
The premiere production was directed by Vicky Featherstone and designed by Naomi Wilkinson. It was performed by Frances Ashman, Ryan Fletcher, Meg Fraser (as Beth), Laura McMonagle, Helen Mallon and Owen Whitelaw.