Part 4/8:
As night falls, a series of ominous events unfold. High-pitched noises cause physical distress in the family, culminating in them realizing their boat has unwanted visitors: holes from the relentless ocean currents. With hope for rescue fading, Tom attempts to send visual signals, only to find that no help is forthcoming.
The following day reveals more horrors as survival becomes paramount. Ben and Julia are left devastated by the realization that the ocean floor beneath them has shifted dramatically, indicating that the poles of the earth have reversed. Their lives are further endangered when they encounter another man, a desperate individual who inflicts tragic violence upon Tom, leaving Julia and her children to fend for themselves.