I didn't discover "Simon & Simon" until 1995 in syndication, although my parents tell me that I used to sit in the room with them while they watched when I was a child. At any rate, this show has been my favorite for the past 10 1/2 years now.
I've always enjoyed the wonderful chemistry between Gerald McRaney and Jameson Parker playing the beloved Simon brothers. Even with the many changes the occurred over the years, their chemistry never wavered.
Mary Carver was wonderful as Cecilia, the independent, opinionated mother of the two title characters.
The character of Downtown Brown was a good balance for the antics of the Simons, and I believe that the years Tim Reid was a part of the show may well have been the best of the series. I never was a fan of Abigail Marsh who took Town's place, but in all fairness, that was a difficult act to follow.
I really wish there were shows like this on television. I definitely miss the crime shows with a touch of humor that were produced in the '70s and '80s.