This season has had a dramatic shift in direction from the previous two. Although I've enjoyed it from the start I feel this season has been like a coming of age event in the story lines.
I hear some reviewers complaining about the advancement in technology being unrealistic. I don't see this as the case at all. If you think where the human race was in terms of weaponry and aviation in 39 it took just over half a decade to develop bomb that could destroy a city and jet propulsion planes roaming the sky's.
The soviet ideology threatened everything America so stood and vice versa. It's not outside of the realms of possibility that technology was enhanced with defence of the moon bases in mind which opened up the door for advanced engines and ship designs.
The show is flawless I love it. Enjoy it for what it is not what you can complain about.