A young deaf boy who calls himself "Captain Johnno" befriends Tony, an Italian fisherman in the small Australian fishing town they live in. Both feel outcast by the town and both share a great love of the sea. When Johnno's beloved sister leaves to go to boarding school, he is so upset he runs away to an island hiding place, causing much distress in the town. His friend Tony helps him understand how much he is loved and missed by the townsfolk and his family.

Based on the children's novel by celebrated South Australian author 'Colin Thiele' , this is an emotional father and son story about tuna fishing of Southern Blue Fin tuna in South Australia's Port Lincoln fishing district. Accident prone son Snook is forever making mistakes much to the chagrin of his father Pascoe. But when tragedy strikes the fishing boat during a deep sea fishing trek in the Southern Ocean, the boy is called on to become a man in a rites of sea passage to reconcile is past mishaps and save both his father and the ship from certain disaster.

The first season of Australian drama television series Prisoner (commonly known as Prisoner: Cell Block H) premiered on the then-known 0-10 Network on 26 February 1979 in Sydney and 27 February 1979 in Melbourne. The season contains 79 episodes and concluded on 28 November 1979.