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
More than one in 10 pregnant women and new mothers reported being dismissed or forced out of their job, research shows.
Pop star Chris Brown was arrested on suspicion of assault with a deadly weapon after a standoff at his Los Angeles home.
The decision not to press charges in the abuse case against Sir Cliff Richard is being reviewed.