The BBC film crew saved a group of penguins and babies in Antarctica at David Attenborough's new Dynasties.
The episode broadcast this Sunday in the UK is about the emperor penguin living in bitter taste at -76F (-60C).
But program director Will Lawson and photographers Lindsay McCare and Stefan Christmann filmed the episode with unexpected challenges.
They became desolate when a group of birds found they were trapped with their cubs beyond the edge of the gap after a whiteout.
The crew made a "unanimous" decision to dig a way out and save them in lethal cold weather, which will undoubtedly make some of the most avid TV of the year.
Lawson said, "We decided to intervene passively, digging that little ramp that took almost no time, and we left it to the birds, and we were delighted when they decided to use it.
There is no rulebook in the situation. You can only respond to facts in front of you.
& # 39; As you can imagine, we show only some of the real trauma and difficulties that animals experience. – It was very hard to see. & # 39;
There were no other animals for several miles. So it was just birds and crew.
Lawson added: "This unique thing is that we were the only other animals in the world, and I think some people will say their opinions in different directions but have made the right decision in their minds.
On Sunday episodes, when viewers saw hundreds of endangered emperors blinking their eyes, they went without food for years to protect their eggs.
"I feel the most respect for the emperor penguin over other animals I have photographed or met," he said.
The three men spent eleven months in a German research institute to film the episode.
It focuses on the survival of an endangered emperor penguin and focuses on fighting cold and cold, but for survival during the winter.