This is a really, really minor nitpick, but I disliked how this episode fell into the old trope of freezing in space. You wouldn't freeze in space very rapidly, even if it was cold out. You'd be dead of lack of oxygen long before that. The problem is basically space can be cold, but it's also a near vacuum and the internal heat from your body would have a hard time radiating out into it. Hence a much bigger issue in spaceflight is actually finding a way to dump excess heat; to stop from overheating.
For the most part, exposure to vacuum isn't any worse than holding your breath for a few minutes. It could cause severe lung damage if you don't empty your lungs before depressurization, and your eyes could get fucked up, but besides that, it's just the whole not being able to breathe thing.
Indeed, I think radiation would be the bigger problem, no?