One of the things that has struck me on this watch-through is clothing. There really is a feeling that there's a limited amount of clothing available. The captured alien being given John's flight suit in that episode with the arm bands, and the way John wears the Peacekeeper Commando vest through most of season 2.
On clothing: They seemed a little uncertain to me about how they wanted to dress Crichton in early season two. Clearly, they felt it was time for the astronaut jumpsuit to go, and they seemed to toy around with some different looks for the guy, taking a cue I think from the Peacekeeper uniform he wore last season.
The clothes they put Crichton in are a deliberate choice, surely, in the way they mirror his character development.
He starts off in the IASA jumpsuit, signifying that he wants to stay as close to his ties to Earth as possible. But by the end of the second season, he's wearing PK clothes pretty much constantly.
This matches the de-innocence-ing of Crichton, and it's exemplified by the episode "My Three Crichtons." Gentle and innocent proto-Crichton wears the jumpsuit. Confused and defiant current-Crichton wears the basic black t-shirt. Smug and unfeeling future-Crichton wears the PK uniform. All of that is entirely deliberate.
Ah yes, Chiana's nebulously defined and forever being re-established special powers. Not my favourite plot point, as one can deduce.
I do wonder what the hell was going on there.
In season 3, she was pre-cognitive, and they implied it was because of her contact with the Energy Rider from "Losing Time," either leaving something behind in her or activating something latent in her Nebari physiology. It was used for a few curious moments, but nothing substantial by the end of season 3.
In season 4, she could slow down current time but not see the future anymore. They give no explanation for the change. I can only assume they decided the new powers were necessary for the season's storylines, but that does make me wonder what the original plans were that got scrapped for the change.
And then in "season 5" aka PKW, suddenly she can see power signatures, which is explained as having new eyes physically implanted - a completely different type of explanation from the first. At least it's used a little during the attack on the Scarren ship.
It's unfortunately an example of thinking about the end result required and twisting a character to fit it, which is kind of backwards from how it should be.