I too have fond memories of watching this delightful show as a kid! It's a shame that no one seems to remember it! It's like The Time Tunnel or It's About Space--I must have been a pretty goofy little kid but I loved these shows and the actors on them and every time I see or hear Monte Markham, I ALWAYS think back to The Second Hundred Years--just like every time I hear about or see James Darren --I think back to The Time Tunnel!! Too bad about the writing as I always thought it was so cute how the Grandfather and the Grandson seemed to gang up against the Dad--but as I said I was a kid and really didn't understand formulaic TV back then!