The course focuses on the four partakers of interactive storytelling: the platform, the designer, the interactor, and the storyworld. When constructing a platform, the problem is to select an appropriate approach from tightly controlled to emergent storytelling. On this platform, the designer is then responsible for creating the content (e.g. characters, props, scenes and events) for the storyworld, which is then experienced and influenced by the interactor. The structure and relationships between these partakers is explained from a theoretical perspective as well as using existing interactive storytelling systems as examples.