Don't waste your time on this series. Non-Cary Grant fans will get the wrong impression of the man. More objective Cary Grant bios write that he did have a lot of idiosyncracies and tendencies toward perfection, but his close friends and coworkers found him in general to be a decent, generous, kind man. I imagine that's why he got very far in his career. "Archie" (the show) claimed that the facts were well researched. Sure, but did little Archie REALLY look on as his mother wailed over his brother's tiny dead body? (He didn't, because he hadn't been born yet!). Many, more informed, reviewers have pointed out the myriad errors in this show.
This series is a glorification of Dyan Canon, and a more accurate title would have been My Life With Cary Grant, so audiences know it's from her POV.