Trivia

Cinematographer Luis Cuadrado was going blind at the time this film was made. An assistant would take Polaroids of the scenes and Cuadrado would direct the lighting by looking through a magnifying glass at these pictures. In 1980 Cuadrado committed suicide after he went completely blind and the tumor in his brain became too painful to face.

According to Víctor Erice, Ana Torrent, who was six years old at the time of the shooting, believed the Frankenstein monster existed in reality. The first time she saw the actor playing the monster in full makeup, she was completely terrified and later she asked him why he had killed the little girl (in the Frankenstein (1931) movie). The actor didn't know what to answer.

There is a total of exactly 1000 shots in the film. Exactly 500 are inside, and exactly 500 are outside.

There is no shot of all the family in a single frame in the entire film: even in the dinner-table scene, the actors are shown separately.

The real first names of actors and actresses are used as names for the main characters. This was because Ana Torrent, who was only six years old at the time, was confused by the different names being used on and off the set.