For a fun scene generator for a broad swath of TV shows, including sitcoms and sci-fi, Text.Theater is a good option. This AI-powered Discord bot can generate scenes from more than 200 TV shows based on prompts, using large language generation technology to fabricate dialogue between characters. Users can prompt the bot with specific commands, like "/simulate" followed by the name of the TV show and a description of the scene, and the bot will generate a scene in a minute or so, depending on complexity and server load. The bot covers a broad range of TV shows, and each scene simulation costs tokens that you can buy from the bot.
If you're looking for a more general-purpose tool to help you generate stories, StoryBee is another option. It's geared more toward general storytelling and creativity, but you can input a prompt or theme and then customize the story with different genres, styles and visual styles. The site also offers an audio narration feature with voice cloning, so it's a good tool for creative storytelling and maybe even TV show scenes.