Number 13 sings about how lucky he feels to be 13.

The numbers get invited to a dance party and sing about the numbers that include 5.

Beakman explains time, how it's measured, and how clocks work. He explains the history of clocks and how we got to quartz clocks today.

Numbers 1, 2, 3, 4, and 5 are playing hide and seek. They hide in a clever way and 5 is able to find them all.

Cintronella Jones catches a man making counterfeit meter sticks and arrests him because he is violating measurement standards. Later, a girl indicates that a meter is standardized across different countries in the world and even on the moon.