The first season of “The Rings of Power” has officially come to a close with an “unexpected” finale as the “Lord of the Rings” prequel series explores the lives and events that took place thousands of years before J. R. R. Tolkien’s trilogy of books (and subsequent films). And along the way, audiences learned how Mordor was created, that the elves were in danger of dying, and there were plenty of signs that evil was, in fact, reemerging.