Crest of the Wave
(Original title)
Het eiland van het gevaar
Belgium (Flemish title)
L'île du danger
Belgium (French title) (alternative title)
Salainen satama
Finland
L'île du danger
France
Secret Island
Hong Kong (English title) (première title)
Mélyen a szívemben
Hungary
Il siluro della morte
Italy
Meeuwen over Sorrento
Netherlands (literal title)
O Rebentar da Onda
Portugal
Seagulls Over Sorrento
South Africa (English title) (alternative title)
La cresta de la ola
Spain
Torped nr 3
Sweden
Seagulls Over Sorrento
UK
Crest of the Wave
USA