Talking Pictures really show a load of crap, and I mean crap, films.
This was one of the worst films I've ever seen. This is literally shows the 'highlights '. The other 90% is people walking in caves, frogmen interminably swimming, and stock footage of the ocean. Also includes the worst false beard in Christendom.
I then moved on to Slave Girls (aka Prehistoric Women), and I wished I had stayed put. For some unknown reason, a tribe of blonde women are kept as slaves by a tribe of brunettes. They all worship a white rhinoceros God, and, accompanied by another enslaved tribe, a 1960s conception of black 'natives', they do a seemingly endless series of ludicrous dances. At the end, the leader of the brunettes is impaled by the horn of a disintegrating statue of a white rhino. There must be more to life than this. lol
And, finally, with trepidation, I moved on to Food of the Gods. Loosely, and that's being very kind, based on a story by H G Wells. Dear reader, I failed : the special effects were so bad a children's nativity concert could have done better. I lasted 40 minutes.