The cat is playing with the Christmas lights and pulls the plug out of the wall. Clark notices that the tree is no longer lit up and plugs in the lights again, which ends up shorting the circuits in the house and electrocuting the cat. Russ flips the circuit breaker to restore electricity to their home.

Jessi and Squeaks demonstrate how a circuit works from the inside using a flashlight as an example.

This clip explains circuit bending, which is an old form of hacking that involves someone bending and hacking at circuits. This causes the circuits to perform in ways not intended by the user. For example, circuits can be bent to create strange noises and change functionality.

Beakman explains how the prongs of cords are needed to complete the circuit of electrons flowing (electricity). He then does a skit where each member of a basketball team is an electron. They stand in a circle (to be a circuit) with Beakman as the battery. Beakman starts passing the ball (charge) around the circle and when the ball gets to the hoop, it goes in and lights the lightbulb. A player is removed and the circuit is broken so the bulb goes out. Beakman then explains how this relates to plugs, and then he demonstrates how a cord is actually two wires side by side to create the circuit to power an appliance.

Bill Nye show us how a circuit works by comparing electrons to water.