1. About books, films, etc. We have "prequel" which tells us about the events prior to the main ones. And how can we call the item which summarizes everything that was shown and said and discovers some things that lead to the very end of the story so we know everything is known and no continuation will follow? I don't mean "sequel"!
2. About crayfishes. What is better to say: they have claws, hands or pincers? And are pincers only plural?
3. About cats. Are there a few ways to call them up saying like in Russian (кис-кис-кис) or only one? Which ones?