Episodes 4 and 5 were broadcast with an opening credits announcement by the Producers: "By request of SicilTecno Company, of Palermo, and by order of the Roman Pretore, we declare that the denomination SicilTeknoPlus is a fantasy name, and therefore the events described in the screenplay "La Piovra 5" do not refer in any way to that company."

Claudine Auger plays the elderly mother of Vanni Corbellini. In real life, Auger is only 14 years older than Corbellini.