Again, I thought there was a thread about this.
If anyone can link it here, I can merge them I guess.
So this is the TV spin off, from the movie of the same name. As is the norm with "time travelling" stories they do end up being written into a corner and you just have to let go of logic and watch it.
It's not amazingly scripted or acted, but its okay to watch. I cannot see it having the cult following of other series airing at the moment.
I watched three series back to back. After each one, it could have really ended for good, but they wrote in a new season rather fantastically. I was very surprised they went to season 4, and again I downloaded them all and started working my way through them. They are pretty ridiculous now, and it reminds me of some of the story arcs and fantastic stuff that was written in to Lost. I honestly think the writers were getting together in a room and either all doing large amounts of drugs or getting pissed before scripting the next episode.
Seems its now a "sci fi origianl" so maybe they bought the rights.