A mother's 14-year-old daughter goes missing for the fourth time; the cruel irony of Colin's lifelong search for his father; the investigation into Bill Rudge takes a sinister twist.

Secrets are revealed as a mother confronts her painful past; Suzannah is nine months pregnant and desperate to find her runaway husband; a woman receives a call she's been waiting on for three years.

A sweet 16-year-old disappears; the search for a woman called Talei Pless, who's been missing for nine years; the love for a lost son helps two mothers find each other.

A dad does his best to cope as a mother of four simply vanishes; a cold case heats up as the team prepare to question a woman they think is Talei Pless, who's been missing for 9 years.

A devoted wife is shattered as her husband disappears without a trace; a brother puts his life on hold to track down his sister who vanished three months ago; the search for man overboard goes on.

Three generations feel the heartache in Jackie's 30 year search for her missing mother; a 70-year old woman disappears without a trace.