Our guide has family records of the freeze going back to 1974. It now arrives roughly three weeks later than it did when he was born, and this year it was later still. We moved camp twice because the ice would not hold.
Everything in this episode is waiting: for a surface to hunt from, for a route south, for a season that used to be reliable. The ice-shift audio that opens the film was recorded on a night the whole camp was awake listening to it.
It is the quietest episode of the four, and the one the crew found hardest to make.
