Alright. The first 3 episodes were...tolerable. This one? Unfortunately not. The show runners need to hire on technical writers and give them latitude to improve scenes and plot mechanisms.
The entire car scene and 'trapped in a space suit' bit was terrible, with the flaming cherry shaped turd being the low budget CGI of attempting to drill the helmet.
The entire car scene, along with essentially every other line of dialogue her character is given, creates a pure image of Sian being the dumbest astronaut to have ever walked the moon.
Among other things, a Volvo with snow tires (spiked) having traction issues of any kind in the given environment is entirely operator error. To top it off, it's a miracle Volvo gave a vehicle over to be crashed, considering it somehow completely failed to demonstrate airbag deployment in a multiple roll.
The fix? They said they were trapped in the hotel by an avalanche. Okay, so then have a small one sweep the car off the road instead. Easy.
The moderately good upswing of writing was the sneeze. More of that, even if a high-school junior could have more eloquently done the exiting dialogue, of which there was no need.