I think it really helps to watch a series from the beginning and I'm glad that SciFi is running everything from the pilot on. I don't watch a lot of TV series -- time constraints -- so I only commit to a very few. If the pilot draws me in, then I stay (and there's another hour of my week spoken for
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If the pilot doesn't catch my attention or I come in later in the season and can't follow the story development, then I'm unlikely to become a faithful fan.
There are a lot of assuredly wonderful programs that I have either never seen at all or seen an episode now and then, never really figuring out what was going on or the relationships between the characters. Thus I am shockingly ignorant of "Babylon 5", "Battlestar Gallactica", "Buffy the Vampire Slayer", and "The X-Files." For one reason or another I just never caught on. The various "Star Trek" series have always had my attention, probably because their version of the universe remains familiar throughout the years. Also, despite constant cast changes, I watched "Dr. Who" as a child living in England (it was the 2nd Doctor then) and was delighted when many years later the program was picked up by PBS. It took some sorting out because the show had moved on to Doctor #4, but I remained an avid viewer until the show vanished into the mists of constant reruns.
But from the first mention of a TV series based on "Stargate" I knew I would be watching, at least for the first few shows. If the team gelled and the stories floated high above the usual drek, I'd be a loyal viewer. So here I am still watching, even tolerating the loss of my favorite character. With luck and foresight, the producers will known when to exit gracefully and move on to feature films, and spin-offs that will do justice to the TV series and the original movie that spawned it all.