I mostri (also known as Opiate '67 or, in a cut version, 15 from Rome) is a 1963 commedia all'italiana film by Italian director Dino Risi.

The themes of the short stories are intended to offer a clear picture of the habits, vices, of cheating and taste typical of the majority of Italians in the Sixties.

Obviously the characters and funny situations are written and staged in a way that touches the limits of satire and coarseness, but many of these issues are still recognized by the Italian company.

The episode The Monster depicts a man who has killed the whole family and has barricaded himself in the house was arrested by two policemen (Gassman and Tognazzi) and photographed with the present.

When the child grows, the first thing it will do is make amends for his teachings repaying his father with a pistol and with the theft of all his possessions.