Hm, didn't even think about Torchwood. Well, but I really didn't like Torchwood the show, so I'm pretty happy to have it kept out; plus, I think the Doctor actually has a decent idea of the organization from last season.

I thought the Tardis had come into Torchwood to pick him up, also, but I think this worked just fine.

Has Mr Saxon been mentioned before then?
Oh yes, several times. He's the one who has been sending people to convince Martha's mother that the Doctor is bad news.

As for next week's trailer, well, I think you've got it--they don't want us to know if/how the Tardis crew escape. Plus, this is the Master's shining moment . . . he's been working behind the scenes, as Mr. Saxon, the whole season (though of course, for his timeline, it's all happened after "Utopia"), and now they're finally letting us see what he's doing, and it's a whole lot of spectacle.

I can't wait. I love this plotline and I also love John Simm a whole lot. Whee.