Practical Effects
Genuine 1950s scuba gear and Caribbean location shooting.
Acting
Lon Chaney Jr. brings unexpected pathos to doomed Swede.
Director
W. Lee Wilder
Trivia, insights & behind the scenes
Director W. Lee Wilder was Billy Wilder's less successful older brother; this was his attempt at the adventure genre.
Released the same year Jacques Cousteau's The Silent World won the Palme d'Or, riding a brief wave of scuba fascination.
US
