"Fer-de-lance" was the designation of the U.S. Navy sub harbored at Terra Del Fuego while picking up a team of researchers and divers for a Sealab project. Also--hey, how's this for irony?--that's the species of poisonous snakes that a thoughtless crewman brought aboard from shore leave...and as the escaped reptiles bite key personnel, the craft finds itself on a date with the ocean floor. Made-for-TV thriller stars David Janssen, Hope Lange, Ivan Dixon, Jason Evers. AKA: "Death Dive." 100 min. Standard; Soundtrack: English.