When Paul suggests increasing the numbers in the family, Murray puts his and Diana's share of the house on the market. However, Paul is displeased with the potential buyers and Diana has something on her mind.

With the prospect of parenthood on the horizon for Murray, Paul is determined to steer him in to a proper job with a reliable income.

It's time for Diana's first prenatal check up and Paul is instructed to hold sex education lessons.

When an old schoolmate gets in touch with Marsha and Diana, they reluctantly invite her round. They know it may ruin Paul and Murray's Sunday afternoon but they couldn't say no to the 'plump old Pear Drop'.

When Paul's mother comes to stay, there's a feeling of gloom amongst the household. However, the arrival of Murray's father adds an unexpected twist.

Now that the birth of the little McCoy is imminent, Paul tries to sell their half of the house again.