Roman Polanski conceived this film several years before he actually made it. He had hoped to cast Jack Nicholson as Captain Red, and himself as The Frog.
As of 2002 the ship "Neptune" from the movie is anchored in the harbor of the Italian city of Genoa (near the "Molo Vecchio"). It has been made a museum and can be visited.
Damien Thomas was cast at short notice replacing an actor who pulled out.
Opening film at the 1986 Cannes Film Festival.
Timothy Dalton was to play the part of Don Alfonso de la Torre before definitively backing out to make himself more available for the next James Bond film.