This movie is basically one giant tearjerker, especially since so much of the cast dies. Of special note are Kazik and Irena's deaths: the former freezes to death thanks to his night-blindness, and the latter collapses of starvation and thirst after days of grueling trek across the desert. Tomasz's death almost causes a Despair Event Horizon among the group.
Irena repeating her name over and over again in her thirst and heat-induced delirium. After her parents were killed, she was given a Russian name and sent to a collective farm, but she never forgot the name her parents gave her even until the day she dies.