Writers Brian Cooke and Johnnie Mortimer were inspired to create "Man About The House" after noticing increasing numbers of advertisements in the London press for flatmates of either gender - until the early 1970s, it was usual for flatsharing households to be all male or all female.
In "One For The Road", it is discovered that Robin's middle name is Oswald. Chrissy points out that his initials spell the word ROT.
The success of this show led to two highly successful spin-off series for Thames/ITV: Robin's Nest (1977), in which Robin starts his own restaurant with his live-in girlfiend (Tessa Wyatt) and George & Mildred (1976) with Yootha Joyce and Brian Murphy, where the Ropers move to a new upmarket area.
Sally Thomsett (Jo) appeared in this just three years after playing an 11 year old in 'The Railway Children' (1970).
It was established that George and Mildred were engaged during World War II. Although Yootha Joyce was just old enough, Brian Murphy was five years younger than Yootha, and he was only 12 years old at the end of the War.
