Lorna and Robin are a young couple who come to stay and Ruth tells Rigsby they are newly-weds. He gives them presents but withdraws them when he finds out they are just living together. They explain that Lorna's stern father disapprove of Robin so - in the absence of Alan - Ruth and Philip ask the father round to discuss things. Due to a misunderstanding he is horrified to think that Rigsby might be his daughter's boyfriend and goes for him, switching his anger to Philip who comes in to rescue Rigsby. Rigsby explains that Philip would not want Lorna as he already has ...