One thing that never made sense
He is 200 years in the past but he also says its a different earth in an alternate dimension.But if he isn't on his own earth how is he communicating with the future by placing ads in the paper.And does that mean that this dimensions version of Darien also went back in time and is in the past in Dariens dimension.
The time travel concept worked fine alone.Not sure why they felt the need to complicate things by throwing alternate dimensions into the mix.