I couldn't make out enough dialogue to know that Dr. Mann was up to something. I saw one astronaut kicking another astronaut down an ice cliff.
Yeah, that was one of the "trouble spots" with the sound. I also wasn't sure what he took off his helmet at first... I guess it was the voice transmitter.
Then I wanted to know why anybody with a cracked faceplate on an ammonia-atmosphere planet wouldn't try to get away from the source of danger as fast as possible instead of offering an alternative ('if I die we both die'). When someone is attacking your faceplate on an ammonia-atmosphere planet you don't wait around because the attacker is obviously deranged.
I just assumed they had a grip on each other and couldn't get away from each other.
Dr. Mann's motive for the attack make sense in a way, although I'm wondering if he wasn't driven partially insane due to his isolation. But Williams spent 23 years in isolation, locked away in basically a small cage with vacuum all around. I know he spent part of it in cryo-sleep, but he admitted to spending most of it awake. In itself, the idea that his planet wasn't to be THE planet isn't a strong enough motive to murder someone.
Yeah, Williams actually held up really well. Pretty crazy to imagine TWENTY THREE YEARS alone. I mean, that's half my life. I don't even remember who I was 23 years ago, really. And for Cooper and Brandt, it was only 3 hours max.
As a weird side note, I think Stephen King wrote a short story called "The Jaunt" about warp travel, but you all had to be asleep when they went through the Gap because if you were conscious, bad things happened. I won't spoil the end, but perceptions of time can really screw with your head.
I think Mann was probably a little nuts from the isolation; his plan was the one to "save humanity" so that stress was on him as well; and it also leads me to believe his character was not as good as Brandt had made it out to be, it sounds like he had some issues that the situation brought to the fore... either with his presumptions, or his pride, or some other flaws in character, where he might have "picked the best prospect" for himself for a planet as group leader and ended up being hosed.
I still was rolling my eyes at his stupidity with the airlocks. I mean, seriously? Apparently he's a top scientist in one field but really thinks it makes sense to open a non-sealed airlock. I'm not a scientist by profession and that still sounded like a bad idea from my end. Murphy's Law, huh?