Torchwood is the 21st century version of Blake's 7.
As I was watching the series ender, it occurred to me that TW is a lot like B7. No one, not even the star, is safe. Anyone can die, and they do -- frequently. And there's an underlying thread of hopelessness from beginning to end. As traumatic as the last episode of TW was, it wasn't any Gauda Prime. They need to work a little harder at reaching that particular level of angst, betrayal and blood shed. But they're off to a good start.
Maybe that's why I didn't feel betrayed by the PTBs of TW. I've been there, done that, bought the t-shirt. Well, okay, I never did buy the "I went to Gauda Prime and all I got was this bloody t-shirt" shirt, complete with bullet holes [g] But you get the idea! I really regret not buying that shirt....