Last time I visited my parents I noticed that they have National Geographic HD. My father told me that he is fascinated by all the animal documentaries in HD.
One evening, he was zapping and Cosmos was on Nat Geo. He zapped to the next channel, not knowing what was on. I told him to go back and listen for 2 minutes.
He was HOOKED. Turns out it was a Cosmos-marathon that showed all episodes. 5 hours later, he was still sitting there.
It was dubbed in arabic. But the way things were explained were very simple and yet mind-blowing. Love his shows!