In recent episodes of the podcast "The Real Brady Bros", Barry Williams mentions that the woman seen here in these photos from "Today, I am a Freshman", was his on set stand-in for all 5 seasons.
Below is the stand-in for Florence Henderson, seen here in the episode “Kitty Karry-All is Missing”
(A standin literally stands in front of the camera to set up lighting and to frame and focus the camera shots.)
