A serial uses the same characters and locations across episodes to tell a continuous story, while a series tells different stories in each episode using the same characters. A serial aims to keep viewers watching to see how the story unfolds across episodes, while a series focuses on standalone stories each week. Single dramas are one-off stories designed for television on topical issues and use a single camera like a film. Documentaries present factual information using real interviews and footage edited together, typically using a single camera. Soap operas feature multiple concurrent storylines across many characters and use multi-cameras for their faster, cheaper filming style. Feature films are full-length movies that fill a program slot and also use multi-cameras