The documentary represents several social groups: - Males are portrayed as both antagonists who experimented on females causing widespread death, and as a distressed newscaster. This reinforces stereotypes of males being dominant and powerful. - The female protagonist is both a weak and fragile sole survivor struggling with isolation, but also strong and independent in her ability to survive on her own. This breaks gender stereotypes of females needing male protection. - The film portrays only white British citizens due to the filmmakers' limited access to actors of other ethnicities. - Teenagers are the subjects of the film to make the storyline more relatable and engaging for the target teenage audience.