Sfida negli abissi was released in the year 1968。Sfida negli abissi is also called as Submarine X-1, Ubåt X-1 till attack, Ubåd X-1, Tauchfahrt in die Hölle, Sukellusvene X-1, Raid suicide du sous-marin X1, DuikBoot X-1, Sous-Marin X-1。

After losing a submarine and fifty crew in a battle with a German ship during WWII, a Royal Navy officer gets a second chance in a daring raid with midget subs.

Sfida negli abissi actors and actresses include James Caan, Nick Tate。