S5, E8: In the Toon Car, Mickey, Minnie and Pluto are on their way to a picnic when the sky turns dark and stormy. To make matters worse, the car's engine sputters to a stop and the tires deflate! As all hope seems lost, an old castle is illuminated by a bolt of lightning, and Mickey, Minnie and Pluto decide to head over to see if anyone can help them and meet Count Mikula! They explain their need for help with their car. Count Mikula also has a problem, his castle is making strange creaking and knocking noises and he doesn't know where they're coming from! In the end, Mickey discovers Count Mikula's problem: Plumber Pete has been fixing a leaky pipe and making all those strange knocking noises!