She took us through Buckingham Palace with a breathless enthusiasm and managed to fit in a few location visits, notably to Venice, as well.
The script that she'd written was so warm and fascinating and told us a lot more than we learned when we did the official tour of the State Rooms in August.
I was particularly fascinated by the choice of gift for a Royal Mistress - not one I would have chosen but never mind.
And by the way the chandeliers were cleaned.
Most surprising of all was hearing Fiona Bruce singing along to a Mendelssohn piece being played on the organ. She has a really lovely voice.
I don't want to give too many secrets away because I want to encourage you to watch it for yourselves, which you can do on iPlayer here.
I'm really looking forward to the rest of the series.