Well, Grottorex, for one, it's strange that you are half way through and ask what happens to cats. Maybe it is discussed in the second half. But, soaked in my snooty and self absorbed attitude, I would enigmatically propose that they might do as other domesticated pets would; multiply and eat each other until theres nothing left. But I would watch the show instead of typing this, I may find out.
Secondly, wednesday, as you suggest, the Sydney trains don't work when fully staffed anyway, so we can safely assume nothing will change.
And Sallysworld, why is it fair for the animals to reign once again without humans interfering? Ahh, natural selection. There's a lot of people (approx. 5,789,726,017 - thats about 5.7 billion) religious types that would disagree with that theory, but I agree.
Jacobson, I agree, it's strange that the FUTURE is on the HISTORY channel, however, past, present and future are all the same moment, according to some, so it's like, the.. now channel..