What a harebrained plot these aliens cooked up to go back in Earth’s time to steal people’s energy. What was the point? Who were these aliens? What was the snake thing all about? How did Picard wind up renting that room? Where did everyone get their period correct clothes? What a goofy episode. And the whole Mark Twain thing (and Jack London) was mostly idiotic except for when Troi taught him about how much better the future is. All around waste of a two part series finale / starter. Ugh.