Susan Barlow turns up unannounced with boyfriend Duncan Craig who she is on a cycling holiday with. Ken is delighted to see them but is shocked that they're holidaying together. Rita is annoyed that the radiators are old - she accuses Len of palming her off with rubbish. Renee dresses up as a man for the barbershop quartet contest. Rita is pleased when Len finishes the central heating. Tony Hayes complains about Renee being in the quartet but backs down when Ivy threatens a female boycott on The Flying Horse. Fred has to admit that The Flying Horse quartet are better singers and buys their team drinks as a prize. Emily organises a party for Mavis' birthday. Rita is delighted to walk into a warm house. Ken makes Susan and Duncan sleep in separate rooms. Albert tells Ken he can't allow Susan