Tiger sharks.
They're one of the Pacific's most formidable predators.
The goal was to film them hunting from above and below the water.
This proved to be the team's greatest filming challenge.
To film this behaviour,
the team sailed 800 miles
to one of the remotest islands in the Hawaiian chain
- French Frigate Shoals.
The timing was critical.
For just two weeks a year,
a dozen tiger sharks gather round this tiny island
ready for the albatross chicks' maiden flights.
So as not to disturb the bird colony,
a scaffold tower was erected offshore
in the middle of the shark-infested lagoon.
This small filming platform was going to be the topside crew's base
for the next ten days -
a daunting prospect for landlubber cameraman John Aitchison.
It's pretty scary being out here when they're really close.
Sometimes the platform wobbles when the waves hit the back of it,
and I do wonder about what would happen if I fell in.
From this vantage point,
producer Mark Brownlow was able to spot the sharks
and direct the dive team to the action.