Gary becomes alarmed that he is sexually inexperienced and invents a rampant past. But proving to Dorothy he has had over 50 lovers could be difficult. Meanwhile, in an effort to impress Deborah with his athletic prowess, Tony finds himself on the top board at the local swimming-pool - and immediately regrets it.

Deborah decides to sell her flat and go travelling in Asia. But Gary and Tony are horrified as they don't want anyone they dislike moving in upstairs.