When someone goes missing - what's life like for those left behind?

This week is Missing Person's Week. Every year, 50,000 missing persons reports are filed in Australia. Luckily, most of those people are found. But for those who aren't, their families are left in a constant state of uncertainty.

Fluctuating between despair and hope their loved one will walk through the door - it's a unique sort of grief, and the only kind experts say gets worse over time.