Here are some series I own, which are not T2K related at all, but worth watching:
Dexter: I only have seen own season one, but S1 is self-contained and, had the series not been renewed, would have left you feeling everything important was wrapped up. I only saw it because CBS was desperate for programming back during the writers' strike a couple of years ago and were airing edited episodes on Sundays nights. The first episode hooked me to the series and after the second I ordered the S1 DVDs from Amazon. Never regretted it.
Tales Of The Gold Monkey: Another show that suffered from network interference, but was mainly canceled because it cost too much, despite decent ratings. It's a pulp series, set in the South Pacific in 1938, with the pilot of a Grumman Goose as the main character. A Japanese princess and German secret agent also factor into the series. There are some technical mistakes (mostly involving the Flying Tigers) but mostly forgivable given the genre. There is even one episode which is a remake of a Battlestar Galactica episode
Day Break: One of many shows that followed Lost on ABC over the years and failed. It was pulled after 6 or 7 episodes but was only supposed to run 13 episodes anyway. It was a bit like 24 mixed with Groundhog Day, as a cop was reliving the same day over and over. The series was a little tedious at first, but after he accumulated enough knowledge about what was really going on, the series began to pick up. There was also one twist to his time loop I hadn't seen in previous stories of the type.