"An Unearthly Child" pretty much just sets us up - introduces Ian, Barbara, Susan & the Doctor. And the Tardis & the whole concept of the series. There were some neat little things I think I only caught because we effectively saw it twice - like Ian saying "I take things as they come" and then totally failing to do so once 'things' were strange. It's very much a product of its time, but not as much as "The Cave of Skulls" which was cringe-worthy in places. The Tardis materialises in pre-historic earth, complete with cavemen (and women). Who are all "We am primitive peoples!", and as J pointed out afterwards I can't work out what I'd've done differently but they just felt like very old-fashioned cavepeople. Tho again there were neat bits and some of the cavepeople stuff didn't half feel reminiscent of modern politics ;) I was also left wondering how the Doctor & Susan had managed up to this point - the Doctor blithely marches off without a care in the world (or the wits to keep an eye out for trouble) to take his samples, and when (inevitably) it all starts to go wrong Susan has a fit of screaming hysterics. If they've been on the run in primitives times & places (the 20th C Earth being both of those for them) for as long as it's implied they have been then you'd think they'd have better first-steps procedures. But then I suppose they're showing off for the petty humans at first - certainly the Doctor is (as he admits at the end) & Susan presumably felt safe with her teachers, 5 months of "authority" taking care of you probably sinks in ;)
The next two episodes finish off that storyline (and the DVD - well, there're special features but I'm not bothered about that), then I've a vague feeling we have Daleks on the next DVD!