Writer extraordinaire Jane Espenson is writing three out of 10 episodes in Torchwood's upcoming fourth season, she told Blastr. In an unusual move for U.S. television, the whole season will be written before the show starts filming, and Russell T. Davies is keeping it tightly plotted. And she adds that she'll be going to new and exciting places with the show:

I love blending tones-mixing the broadly comedic moment in with the darkly dramatic one can heighten both. Torchwood is a show that welcomes that kind of moment. I'm also really eager to play with all the culture-clash material that comes naturally out of the show's pedigree. And I'm especially eager to write material that pushes the boundaries of what can ordinarily be done on television.

[Blastr]