Pleased to report that episode 8 is not another earth-bound story, they're on another planet at last! (Not that I have anything particularly against all the set on earth eps, it's just nice to have some intergalactic action as well.) It's a two-parter, and a bit of a slow-burner, with elements of Alien and Stargate, and a dash of Red Dwarf.
I'm probably the wrong person to ask, because I just wish it was Dr Who/Captain Jack
But nah, it doesn't worry me. I'm finding the RTD versions way more watchable and enjoyable and interesting than classic Who. It's like it has grown up with me. I like that very much.
ETA: I just asked Mr Tweed his opinion and he said that he views Dr Who as being asexual, so any romance is pointless because it wouldn't lead to eventual sex. He thinks it isn't in the Doctor's character to get it on with anyone.