Mizar (Sabotaggio in mare)

It was released in France as Mizar (Sabotage en mer), the United Kingdom as Frogman Spy and in the US as The Woman Who Came from the Sea or Frogwoman.

It is loosely based on the World War II actions of the naval officer Luigi Ferraro.

It also marked the second appearances of Charles Fernley Fawcett and Paolo Stoppa, two of the few actors De Robertis used in more than one film.

The cinematographer was Carlo Bellero with his usual camera operator Dino Reni (Bernardo Procacci).

Film editing was by Eraldo Da Roma, who also worked with De Robertis on La nave Bianca (1941) and Uomini ombra (1954).