There aren't a lot of TV shows that I follow, and I almost never watch them when they're on, thanks to the magic of Tivo.
Daily:
- 11pm: The Daily Show
- 11:35pm: The Tonight Show
Fri:
- 7pm: Firefly
- 8pm: Stargate SG-1
- 9pm: Stargate Atlantis
- 9pm: Threshold (the jury is still out on whether this will earn a permanent spot in my line-up)
- 10pm: Battlestar Galactica
(As you can see, my Tivo lives on the Sci-Fi channel on Fridays.

)
Whenever:
- Doctor Who (no US station has picked up the new series, so I download it after it has aired in the UK)
Hmm. Stargate and BSG are about to enter mid-season break, which runs until January, and there won't be any new Doctor Who eps until the Christmas special. Threshold better be good...
Edit: I forgot The 4400 - when does that normally air? No new episodes of that one for a while, either... *sigh*