First broadcast 25th September 1975.

The three flatmates agree to a system whereby if one of them wants to bring home a partner they will give notice so that the others can arrange to be out.

Richard O'Sullivan - Robin
Paula Wilcox - Chrissy
Sally Thomsett - Jo
Yootha Joyce - Mildred Roper
Brian Murphy - George Roper
Doug Fisher - Larry
Wendy Allnutt - Susan
Veronica Doran - Myra
Mark Cooper - Desmond