In 2014, 17-year-old Lizzie Burdett left her boyfriend’s house and never made it home. Her boyfriend, Tom Caruso was the last person to see her alive but he fled town soon after her disappearance. No charges were laid, the case went cold, and eight years later - her family want answers. Someone knows something... You Don't Know Me - a six-part crime-thriller audio drama set in Sydney’s Northern beaches where the unsolved case of a missing teen exposes the secrets of those in the community around her. Adapted from a novel by award-winning Australian crime writer Sara Foster, this crime-mystery is full of unseen twists as each episode focuses on a different potential suspect.

In 1970, three-year-old Cheryl Grimmer was taken from an Australian beach. No-one knows what happened. Fifty years on - can the mystery be solved? From the BBC.