The Brady Bunch Got Two Episodes out of the TV Tropes of One My Three Sons Episode

In the 1965 My Three Sons episode, "It's a Dog's Life", Steve is at home with very important plans he has drawn up for work.

Unfortunately the plans get lost, and madness ensues.

Steve finds the plans just in time to deliver them to an important client who was just about to leave town.

It turned out, the culprit who took the plans was the family dog. Unknown to the family, he was stealing many different things in the home.

(Eps.:"Cincinnati Kids 

and  "Kitty-Karrry-all Is Missing")