Harold and Evelyn Gern are "vacationing" in Puerto Rico, with friend/lawyer Martin when while scuba diving they realize that all the world's oxygen has left the atmosphere for some inexplicable reason. For all purposes and intent, they are the last human beings on Earth. What shall they do? Can two men and one woman coexist alone? Watch this film and those questions shall be answered. This film is very creative on many counts and it is a satisfying tale of what life might be like for a handful of survivors in a post-apocalyptic state. The film is a Roger Corman quickie/cheapie, yet don't make that keep you away. Corman is a good director and does know how to get the most with what he is given. The script is written by Robert Towne, and although it has holes, it is inventive and interesting. The acting by Anthony Carbone, Betsy Jones-Moreland, and Robert Towne as the trio is very good. Jones-Moreland is lovely and she gives a very good performance. Above all, the film reiterates the flaws that exist in each of us no matter what circumstances we are thrust into. On a side note, the same director, same crew, same actors, and same locations were used for a film simultaneously made with this one...Creature From the Haunted Sea. A word of advice: AVOID IT!, but see The Last Woman on Earth.