VIDEO EXCLUSIVE: National Geographic Explorer Bertie Gregory On Filming Largest Herd Of Whales Ever

“We went with such an ambitious target. It was definitely the most ambitious expedition I’ve ever run,” Gregory revealed. “That was the big one because that was really what I’d gone to National Geographic with when I was pitching this project. We can go for the biggest gathering of whales ever in Antarctica and they went, ‘Yeah!’ and I went, ‘Oh okay, how are we going to go do it?’ We had a month aboard an ice strength and sailboat across the infamous Drake Passage from South America down to Antarctica.