During the filming in Greece, Hannah Stacey (Stunt Double for Camilla Rutherford) set two new British freediving records.
Sébastien Nagel, real-life chairman of the world freediving agency AIDA, is a key character in the movie, however portrayed quite unflatteringly. Watching an early sneak review of the film left him quite angry about the depiction of himself, and reportedly the agency has initiated an official lawsuit (August 2004). He later retracted all his objections and apologized.
The film was aired for the first time at a sneak preview for the world freediving elite at the team world championship in Vancouver in August of 2004. It immediately caused major controversy in freediving circuits, because of storyline critique of the real AIDA agency depicted in the film. Apparently, the freedivers themselves found the film's depiction to be unrealistic. It was reported that during many of the films dramatic highlights, parts of the audience were giggling.