In the documentary about Olivér Halassy, the outstanding sports career of the legendary swimmer and water polo player is shown, and with the assistance of Olympic and Paralympic champions we also gain insight into the world of domestic water sports in the 20th and 21st century.
| Title | The Marvellous Defender |
|---|---|
| Release Date | 2018-01-01 |
| Runtime | |
| Genres | Documentary |
| Production Companies | GreenScreen |
| Production Countries | Hungary |
