Harold Gern, a shady businessman from New York, is spending a holiday in Puerto Rico with his attractive wife Evelyn. They are joined by Martin Joyce, Harold's lawyer, who has come to discuss the latest indictment. Harold invites him along on a boat trip during which all three try out some newly bought scuba diving equipment. When they resurface, they find out that the world has changed forever.
Unfortunately the movie Last Woman on Earth is not yet available on HBO Max.
| Directing | Roger Corman | Director |
| Writing | Robert Towne | Screenplay |
| Production | Roger Corman | Producer |
| Sound | Ronald Stein | Original Music Composer |
| Camera | Jacques R. Marquette | Director of Photography |
| Editing | Anthony Carras | Editor |
| Sound | Beach Dickerson | Sound Recordist |
| Production | Charles Hannawalt | Associate Producer |
| Production | Jack Bohrer | Production Manager |
| Art | Stanley Watson | Property Master |
