5/5 The colonel plans to fire the sonic weapon and risk a global catastrophe.
4/5 Nick battles to find the person responsible for his lover Belinda's death.
3/5 What is being built out in a remote Australian desert? And what havoc will it wreak?
2/5 The colonel persuades Sam and Joshua to help him in his deadly infrasound project.
1/5 Earthquakes rock Australia. Seismologist Sam investigates, and uncovers a nightmare.