Comic genius Leonard Rossiter heads the cast in this enduringly popular comedy of lodgers versus landlord. Rigsby is miserly landlord to three tenants, Ruth, Alan and Philip. In Series 3, Ruth returns to Rigsby's boarding house, having decided not to marry the local librarian after all. She admits that there was someone else who she could not forget. Rigsby, of course, is delighted - after all, who else could she be referring to? And in the final series 4, , Alan becomes a fully fledged doctor and flies the nest to try out his dubious medical skills on an unsuspecting practice. Leaving Rigsby with his two long-term inmates - the genteel, fluttering, fading Ruth and the suave African Chief's son Philip - plus the occasional visitor who take up residence in Rigsby's awful accommodation.