Invisible Worlds is a BBC documentary mini series about things in our world that or eyes don't have the capacity to see. Too fast movements, infrared light, microscopic activities are some subjects these three episodes discuss.
The actual title (on IMDB at least) is "Richard Hammond's Invisible Worlds". Richard Hammond is the narrator/presenter of the three episodes. And that's all he has to do with this series. Which is why I don't want to classify this series by that name. If he had been the main producer and/or the director, THEN I might have felt comfortable calling the series by that name.
Anyway, on to the actual documentary.
First things first; I loved this documentary. I loved it because it's gorgeous (duh, it's BBC), informative, interesting, cool, and really entertaining. I never felt bored while watching this. In fact, I was glued to the screen from the very first minute to the very last. I saw with some friends and we marveled at some incredible sequences and laughed because of some other ones.