After a quick research, the man I was talking about is named Graham Hancock and he's not even a professor, just a journalist and writer.

In the documentary, I do admit that he had some interesting observations and raised pertinent questions about Göbekli Tepe in Turkey. However, he lost all credibility when he seriously talked about an ancient continent named "Kumari Kandam", which would be located in present day Indian Ocean, spanning from Madagascar to Sri Lanka and Indonesia. Without dropping the name, he was definitely refering to Atlantis. That was, and still is, pure fantasy and Indian nationalist propaganda to me.