I hope somebody can help me with this. I don't have a whole lot of info to work with. My friend said in the 70's she saw a movie? or tv show about the last two survivors on earth. The man survivor was scuba diving when the catastrophe occurred and she was not sure about how the woman survived. She also thought the title of the show or movie had the word "day" in it. Like "the last day" or something to that effect. She didn't know if it was like a twilight zone episode or a made for tv movie. If anyone could help me I would appreciate it.

Geno