Angela buys Old Tom a robot and cleans it. At first, Old Tom dislikes the robot - especially when it tries to clean him - but when it cooks Old Tom dinner, he and the robot become good friends. Knowing the house and Old Tom are in good hands, Angela goes out with Lavinia, while Old Tom and the robot play together. However, when Old Tom gives the robot a glass of milk, it goes berserk, so Old Tom locks it in the cupboard. Then the salesman returns, trying to sell another robot, so Old Tom releases the berserk robot, which chases the salesman down the street.

The local playground is old and dilapidated, so Old Tom and Lucy decide to hold a fundraising fete to build a new one. However, Lavinia takes over the fete and hardly raises any money at all. When Old Tom and Billy get into a tussle over the playground's maypole, they accidentally drill it into the ground, striking a spring of natural mineral water, which soaks Lavinia and ends the fete. But the underground spring turns out to be very valuable and, with the proceeds, a new playground is erected in Old Tom's honor.