I believe this is accurate but -- I think Facts of Life is #2 TV Show in terms of age with the cast all still surviving.

Ranking Requirements has to be:

1. A Regular Season to Season, Episode to Episode American Television Series (not a variety/mini-series-/special )

2. All main cast still surviving (excluding supporting cast which for this show would be actors like George Clooney, Pamela Segall, Sherrie Austin, Mackenzie Astin, etc.......)

Rankings are as follows if i am correct:

1. One Day At A time 1976
2. Facts of Life 1979
3. Who's The Boss/Cosby (any 84 sitcom)


Is facts of life number 2??

not sure, but how about the partridge family 1970? they are all still around right?

also, i know they only had 2 seasons, but all the monkees are still alive... i think LOL!?! :)