After advice from a doctor Caroline and Charlie have regular sex at unlikely times but she seems unable to get pregnant. Jo,however,who has just split with Dan over his desire to stay in Paris,announces that she is going to have a baby. Then a certain amount of confusion arises after Laura confesses she may have accidentally switched the pregnancy testing kits. A dash to a late night store follows with both women taking the test in the shop toilet,Dan returning from Paris and happy endings all round (thetvdb.com)