This is the second one of the Inspector Rizzo movie series (along with Flatfoot in Hong Kong (1975)) where Bud Spencer exercises his swimming talents. Here Spencer, being an Olympic swimmer for Italy in 1952, 56 and 60, crosses the Nile River in Egypt by crawl swimming.
Robert Loggia, in the italian original version is dubbed by Pino Locchi who usually dubbed Terence Hill, with whom Bud Spencer co-star in mano Movies. On the other hand, Bud Spencer, who is usually dubbed even in the italian version, in this movie use his own voice