Water Rats

Back on the job after having shot her fiancé, corrupt copper John "Knocker" Harrison dead, is Detective Rachel Goldstein, reacting snappily to being dubbed "Gunner Goldstein" by a colleague.

When a light plane crashes in Sydney Harbour the divers have the task of pulling out the passengers while Frank and Rachel investigate the pilot.

When the owner of a shipping company is killed by a bomb down on the waterfront, the detectives are assigned to find out who is responsible.