Brady Bunch, The - Walk Through Door
On any Brady Bunch where the kids are in the back yard you can notice that there is no glass or screen in the back door through which they enter the house. There is one episode where Bobby (I think) even forgets to open the fake sliding door and walks right through what is supposed to be the screen. Also, the grass in the backyard is astroturf, which is probably apparent to everyone.
on 12-04-1999 and