Chris takes a new step in his life.

Theories abound as to where Lyn might be.

Looking for answers to Lyn's disappearance.

Lyn goes missing.

Family and friends talk about life in Sydney's Northern Beaches.

Chris was a sports teacher at Cromer High School.

Lynette Dawson was a devoted wife and mother before she went missing.

A star footballer. His school girl lover. A wife who vanishes.  The Australian’s Hedley Thomas digs deep into a cold case which has been unsolved for 36 years, uncovering startling new evidence.