There are many faults:
1. There are many logical errors. First of all, if you cannot go to the future then none of the people from the past can be in the present time. It's such a large blunder.
There are many more such blunders. For example, if someone comes from the past, they shouldn't be able to recognise someone they meet in the future.
2. The show is inconsistent. Some episodes are really good, and some are really boring. For example the episode in which there is a witch being persecuted in season 3. That episode made no sense, in terms of the overall show.
3. They use Spanish actors for people from other countries. I mean seriously? Do you want to cut costs that bad? Badly spoken English and German. American TV shows go to treat lengths to show authenticity. Spanish ones, I am afraid, don't have that quality. Since people in Spain can't make out, it seems.
However, on the whole, it's good to pass your time.
2. The show is inconsistent. Some episodes are really good, and some are really boring. For example the episode in which there is a witch being persecuted in season 3. That episode made no sense, in terms of the overall show.
3. They use Spanish actors for people from other countries. I mean seriously? Do you want to cut costs that bad? Badly spoken English and German. American TV shows go to treat lengths to show authenticity. Spanish ones, I am afraid, don't have that quality. Since people in Spain can't make out, it seems.
However, on the whole, it's good to pass your time.