Are there any in-jokes we should be looking out for?
Well, if there's in-jokes you wouldn't be able to see them. I've tried very hard not to make it a campy series, I think it's terribly important that within the actual programme everything is completely logical and taken seriously otherwise you tend to lose sympathy with it. There's no post-modernism going on at all, if that's what you're asking.
You said there were references to Doctor Who. Are there any nods to other science fiction or fantasy shows?
There might be but they are probably subconscious if they are.