Absolutely magnificent.
At times I felt I was watching a science fiction film, so otherworldly it was. This episode caught me by surprise, so far I thought the series was incredible , but this episode it's at another level, I was marvelled to know that the cave in Vietnam was recently discovered, the shots there are absolutely magical, so much we still don't know about our own planet... and how fragile it is, glad that they manage to convey by the beauty of it all and the stark contrast of loss, how delicate and critical the situation is, and it is done elegantly and quietly, images speaking for themselves. Highly recommended.
