This was the film that first introduced me to the actor, Duncan Regehr, who played the leader of the Bow people. His performance and that of Christopher Lee as the conflicted leader of the sunken Goliath were the only bright spots in this sci-fi thriller. It could have been a great picture for the idea was fascinating, but the writing was heavy-handed. Even such top-notched character actors as Jeanette Nolan, John McIntire,John Carradine, and Jean Marsh were hampered by the insipid dialogue. I love Frank Gorshin but his performance here was a comic book caricature and unworthy of him. Both Mark Harmon and Emma Samms were pretty to look at, but bland. Duncan Regehr came across as sexy and powerful, and one of the film's implausibilities was that the heroine would prefer Mark Harmon over him! Duncan Regehr and Christopher Lee, were the only actors who gave a three-dimensional performance to what was written as one-dimensional characters. Still it's not a bad picture-- it is a interesting picture, but not a compelling one!