Robin Tripp (Richard O'Sullivan) thinks he's died and gone to heaven when he finds himself sharing a flat with Chrissy (Paula Wilcox) and Jo (Sally Thomsett).
Unfortunately for him, sharing a flat is as close to heaven as he gets with either of the girls.
Meanwhile, landlord George Roper (Brian Murphy) and his wife Mildred (Yootha Joyce) are always on hand to keep everyone on the straight and narrow.
This programme spawned two successful spin-off programmes, Robin's Nest and George And Mildred. It was later remade for the US market as Three's Company.
Series: 6
Episodes: 39
Transmitted: 1973-1976
Channel: ITV
Thames Television