I don't usually go for cross-over fic, but this is great! You have Mal's "voice" just right. I like how you were able to meld the cultures surrounding both Malcolm and Kara into this fic. You did some unusual things with punctuation (or lack of) in Mal's dialogue, but I think it suited the unique Firefly dialects very well.

I liked this edgy little piece. I hope you continue it soon ;)

I think you did a really good job telling Nathan's pov in this. I like the idea of the red doors, I could easily visualize this whole scene. The ending was bittersweet and satisfying. One thing, about a beginning sentence, I had to reread it a few times to comprehend it. I'm not sure if I'm reading it wrong or if it's just wrriten odd or needs a comma or what,

Occasionally as I passed a door would be rocked in the frame from inside of the cell behind it.

I just think it could be worded better somehow.

Also this sentence,

Keeping him alive was the beyond cruel.

You have an uneeded the here.

Overall though I really enjoyed this piece!

I hope he got his revenge on those twirps! This is a good one-shot, really gets into his head back then. Great job!

This is a wonderful little piece. From waking up in the morgue, cold and afraid, you captured the anxiety and details very well. I love the betrayer being betrayed end of it as well. Great job!

I really love the descriptions of the explosion and everything after. This is an interesting twist, the possibility of two Sylars? I love that! The only thing with some of your sentences, while wonderful and rich with description, they needed comma's or breaks in some spots. Also near the start you had one typo "feel by body" I think you meant, "feel my body". Overall though I love it, I hope you continue!