BBC One Wales have released a short preview video for Helicopter Rescue, the documentary featuring Prince William and the Search and Rescue team at the prince's base at RAF Valley on Anglesey.
The Duke of Cambridge is shown piloting a helicopter on a rescue mission to a slate quarry in Blaenau Ffestiniog.
One of his crew are winched from the ground after rescuing a boy who had fallen off an old railway bridge onto rocks.
"As captain you're trying to play out the entire rescue, the transit to the rescue and back again in your mind, and pick up any circumstances or problems you can foresee, and try and fix them on the ground before you get airborne," he says in the programme.
More top news
At least four plots attempts to smuggle highly-radioactive materials to Islamic State militants were stopped in the last five years.
Women should be warned not to drink alcohol for the whole of pregnancy to avoid harming their baby, researchers said.
The Hollywood actor went out of his way to try and reunite the woman with her ID - months after a stranger handed him back his credit card.