Himself - Narrator: Human beings venture into the highest parts of our planet at their peril. Some might think that by climbing a great mountain they have somehow conquered it. But we can only be visitors here. This is a frozen, alien world.
Himself - Narrator: On the highest summits of our planet, nothing can live permanently.
Doug Allen: [showing off his blind] It's actually, I think, quite comfy. Here's the bed, and I've got pretty much everything I need. There's film stock. I brought some water up from the river. Sure it's a little cramped, but it's great enough. And then all I need now are one or two pussy cats...
[peering outside for snow leopards]
Himself - Narrator: The final day of filming was to bring the best luck of all.
Himself - Narrator: Planet Earth's 3-year quest ended with this extraordinary footage. A wild snow leopard hunt. Something few humans have ever even seen.