Barrowman said late last year that Starz hoped for seven years out of Torchwood. And hasn't Davies already passed the baton to Jane Espensen to run future seasons?I do wonder what will happen if Starz decide they want to do another series and the BBC don't?
If the BBC weren't interested in co-producing it any more and Starz wanted to continue, I suspect that Starz would produce it themselves and then sell it internationally a la Spartacus or Camelot.