Visitors

Visitors started out promising and then ran out of steam at the end. While it did neatly wrap up the series, it opened up many new threads to do so. It is as if a big ball of twine was considered "tied up" because it was made into a big mess. We have time travelers splitting themselves and others into multiple copies. We have the earth getting destroyed by aliens, then getting undestroyed. We have a baby getting killed by an evil king, then getting unkilled, but disowned by his own mother in another time stream. Yes, it does provide plenty of thought points concerning time travel, but that is about all it does.