Is the Fifield mutant trying to get Peter Weyland?

The point is now. If the SJ's are not exactly what we think they are in terms of physic and this new alien looks different. Then dumdum statue looks like human, why?

I believe that any infected crew member has the instinct to infect others as a means of reproduction and Peter Weyland is, in general, being protected from all and everything.

If I am not wrong then usually intelligent species don't choose the sick people for reproduction or for infecting (as per my knowledge after watching horror like species). So going by that theory, there are 0 chances of peter weyland getting infected, then again it's alien movie. So i'll shutup now lol

So far the prediction is then that Peter Weyland is just being protected in general, and the Fifield mutant is just going to kill anything he sees.

"Anything and everything."

I have a feeling Fifield is just a wee bit angry about being left for dead and torched when he returns. Basically a disgruntled employee times a meeleon.

A bit of both. The mercs' job is to protect Weyland, so they're doing their job. But I do think the Engineers can communicate telepathetically, and understand that Weyland is there to steal bio-tech, knowledge, and/or the secret to immortality. Of course Fifield is a mutant, not an Engineer, and perhaps doesn't have that telepathic ability; but maybe he's being mind-controlled? Normally I find telepathic plots kinda lame, just as I find time travel plots kinda lame. But maybe Ridley Scott can pull it off. Besides, human tech has advanced so much by the time Prometheus takes place, the Engineers need some kind of really outstanding characteristic or ability to make them stand out as gods/kings. Takka's thought about Fifield as disgruntled employee sounds about right, too. Though for the life of me I can't figure out why Scott wants the Prometheus crew to be so danged scrappy. They're supposed to be highly professional, highly educated, top-of-their-game elites hand-picked for a super-special, super-secret mission that also happens to be the costly "immortality" project of perhaps the most powerful man on Earth. Then why so scrappy? Scrappy made sense for the Nostromo's working class crew. It makes no sense for Prometheus's. And yet here are these doofuses, talking back to Vickers, taking off their helmets inside alien architecture, petting the hostile wildlife, and sticking their fingers into mystery goo. I need to shut up now, or I'll end up convincing myself that this is perhaps not the amazing movie I want it to be!