I've been rewatching Murder, She Wrote for a while now and I'm currently on season 6. Although I think I've watched most of the series, a lot of it is unfamiliar to me. There were only a few episodes from seasons 2 and 3 that I actually remember.
Today I watched the episode where Grady got married. Incidentally, the two actors are also married in real life, as I just found out. In the wedding episode, Jessica tells a relative of Donna (Grady's wife) that she and her husband took Grady in after his parents died in a car accident. Until now, I always thought Grady was just some random nephew of Jessica's, but he actually lived with her. Was it ever mentioned how old Grady was when he came to live with Jessica and Frank?
I'm amazed at how silly Murder, She Wrote is in season 6. There was an episode with two over-the-top female detectives, clearly meant to evoke Cagney & Lacey, and many other episodes are no longer idyllic like the beginning, but just silly. I hope this is just a phase and won't continue for the rest of the series.