Rob tells Claude Wilbur and "Jellybean" that he has been working for Alan Brady for about seven years. Airing in 1966 this means Rob started on the Brady show in 1959. However, that has to be incorrect. Earlier episodes established that Rob was working for Alan Brady for about a year before Richie was born. Richie's eighth birthday is celebrated in an episode shot in November 1963 and aired in January 1964. That means Richie was born towards the end of 1955 or the beginning of 1956. Thus Rob had to be employed on The Alan Brady Show somewhere around 1954 or 1955.