Todd Sampson's Why? - Episode Guide

The complexities of unregulated sperm donation sees half brothers and sisters all around the world. We meet a father who has children in the hundreds. Many of the mothers can't afford IVF and instead choose to go down the private path to take away some of the anonymity and costs associated with donor clinics.

Donor Dads is not a story about right or wrong. It is a story about autonomy, intention and consequence. It explores how hope, desire and access are reshaping the most fundamental human act: creating life. In a world where biology can be shared with a message and a meeting point, regulation lags behind reality, and the long-term impacts remain unknown.

They are stockpiling food and weapons, learning survival skills, and building bunkers beneath the earth. To them, collapse is not a distant fantasy or a Hollywood trope. It is a real and imminent possibility. They call themselves preppers.

Todd spends a week embedded with the family and the group, observing their routines and training. What quickly becomes apparent is the depth of their commitment. This is not casual contingency planning. This is a way of life.

But the more Todd witnesses, the more he begins to question the driving force behind it all. Why devote so much time, energy and resources to events that may never happen?

We meet devout members of the Aetherius Society, an international religion that believes life on Earth is guided by advanced extra-terrestrial civilisations existing in other realms on planets in our solar system.

How did risking your life become a hobby? Combine a healthy dose of social media, the addictive rush of adrenaline, and the rise in extreme sports, like free climbing and BASE jumping, and you might get close to an answer.