I've finally watched this and in fact was grateful for the comments about who had produced it etc., because without knowing it would seem odd that his whole life story wasn't there.
First off it was easier to watch not thinking is he like Cary Grant, but just for the story line.
I didn't know much about him, but it seems to have been an extraordinary life. And much like the programmes that look into people's past, a reminder that even if we think today people lead complicated lives, they were also doing this many years ago.
I think the section that covered his relationship with Dyan Cannon wasn't meant to show him as some sort of saint, but to show how his odd life style and basically old fashioned ideas meant that their relationship wouldn't last. And probably why his early marriages failed as he was clearly a control freak!
I think the series was as much to show that becoming a father turned him into a "better" person.
Assumping the representation of his mother was right, what a shame that they couldn't have had a better relationship, but quite a show of strength for her to have survived those years, decades, locked up in an asylum by a vindictive man. Who she chose to remember as some angel, when he was the one who stopped her getting a doctor for her other son, and not just abandonded her, but got her locked up!
No wonder Cary Grant was a bit strange.
I think which ever actor it was that played him as a young man who was "excorting" older women whilst trying to get into movies, was in fact the most convincing. (I never knew that famous line from Mae West was said to him!)
The problem with Jason Isaacs was not just that the voice wasn't quite right but some of the make up was really bad.
Not sure if in the Dyan Cannon time he was quite tanned and the make up department for the series, was a bit clumsy, or in fact in real life Cary Grant walked round wearing badly applied fake tan.