Every time I mourn the death of a great show, I lament why "reality" crap like Biggest Loser or Keeping Up with the Kardashians isn't cancelled. Damn you, capitalistic broadcast networks! And damn you too, idiot viewers! Unfortunately for me, shows which grow on me fall on Friday and just when the love blossoms, they get cancelled.
While we're on the subject, have you noticed that they air a lot of geek (e.g. Dollhouse, Numb3rs, Smallville) and adolescent girl (e.g. Ghost Whisperer, The Vampire Diaries, Ugly Betty, Smallville) genres on Fridays?
It's not so suprising when you understand why they do that. Think: single young girls and nerds with nowhere to go on a Friday night sitting in the lounge with fantasies of vampires in high school, and apocalyptic futures caused by the misuse of technology.
Also, Friday slots are where shows go to die.
Most shows die because viewership is horrible. Everyone's out on a Friday night, and tv ratings make it difficult to justify renewals. Shows like Dollhouse and Terminator: The Sarah Connor Chronicles were destined for doom just for being on Friday nights. Ugly Betty got lucky, though. It's been bumped to Wednesday, from Friday, for its new mid-season schedule. The general consensus on Friday ratings is that, you don't expect much from it. Maybe you can't expect much in terms of life span too.
Anyway, I wish you knew what I was ranting on about, but thanks for reading. Merry Christmas.