K. Tempest Bradford runs down some of the most common stock plots in science fiction TV, and it's a wonder to behold. A new castmember joins the show, but everybody acts as if he/she has always been there? Check. You're stuck reliving the same day/hour over and over again? Check. You're in a mental institution and they're trying to convince you your life of space adventures were just a crazy dream? Check check check. Her awesome post includes examples from Star Trek, Stargate and Torchwood, and we'll probably be mining it for ideas for months. [K. Tempest Bradford]