^That is my biggest fear with this move to Starz, that they'll Spartacusize it and make it unnecissarily explicit. And I'm saying this as someone who has enjoyed Spartacus, but IMO Torchwood works fine just the way it.
I find that a surprising reaction, given that Torchwood is already a lot more adult and graphic than any non-premium-cable US show, with lots of violence, explicit profanity, sexual situations, and nudity (all male, alas). I can't imagine it working on anything other than a premium channel in America.