Probably the biggest headline so far coming out of these previews is what Harry says about asking Charles to walk pre-Royal Meghan down the aisle at their wedding. You don't say. But I always wonder what meddling is.
And he vows to stop campaigning on the environment, architecture and homeopathy as king, insisting: 'I'm not that stupid'.
The Prince has given in-depth interviews to the documentary called "Prince, Son and Heir: Charles at 70" while programme makers have also been given exclusive access to follow the royal for the past 12 months as they made the show.
"But the idea somehow that I'm going to go on exactly the same way if I have to succeed is complete nonsense because the two. the two situations are completely different".More news: Google could be preparing two mid-range Pixel smartphones
"I've never been a monarchist, but if you believe in a monarchy, then I don't see why the monarch now, or in the future, should be expected to be completely viewless and silent on everything", he told the Press Association.
Anti-monarchy campaigners Republic said: "Charles has routinely abused his position of power, privately lobbying cabinet ministers and influencing government policy with his own political agenda. I don't think people realise quite how kind he is". In the BBC documentary, he said that he will operate within "constitutional parameters" when he becomes monarch, which is a "completely different" role to being the Prince of Wales, as the heir in Britain is known. "So of course I understand entirely how that should operate".
"They were disappointed. Meghan cried, I'm sure, she did cry, and they both said, 'Take care of yourself, we are really anxious about you, '" he said on ITV's "Good Morning Britain" in June.
Tonight a new documentary about Prince Charles will air on the BBC.More news: Kevin Harvick fails inspection, loses guaranteed spot in NASCAR Championship 4
"I would like him to have more time with the children", William says of his father. "And I would love to tell him to pace himself, but I'm afraid that's not gonna happen". Prince William adds: "Having more time with him at home would be lovely, and being able to play around with the grandchildren".
Charles' wife, Camilla, Duchess of Cornwall, recalled it all saying, "A lot of people, seeing my husband actually take the bride's mother by the hand to sign the registry, it's something that moved everybody". Because when he's there, he's brilliant.
Prince, Son and Heir, Charles at 70, on BBC 1 at 21.00 on Thursday 8 November.
" I need hardly say that I hope, very much, that I might return before too long".More news: Rihanna Tells Donald Trump to Stop Playing Her Music at Rallies