Sir David Attenborough's latest BBC One series documents how parents from across the animal kingdom sacrifice everything in order to raise their young.
And in the case of the African social spiders, in Namibia, it is quite literally the final sacrifice.
As we discover in Parenthood, the mother spider gives her life for her spiderlings, who, when the time is right, slowly but surely creep up on her and their other elderly relatives en masse and eat them alive... making room for the new generation.
Known as matriphagy, for director Jeff Wilson this moment provided the scene for "the perfect natural history sequence", as well as "the best narration I've ever heard him [Sir David] do."
"David knows exactly what is needed to tell the story," says Wilson.
