"The Polka Dot Umbrella" is the first half of the fourth episode of Oswald. It premiered in the United States on August 21, 2001.
Oswald finds a discarded umbrella and tries to find out what to do with it.
- The polka dot umbrella is used by Oswald in many subsequent episodes. Henry is also shown walking with an identical umbrella in "The Birdhouse".
- Madame Butterfly is not holding Catrina when she first appears. When she is shown at the end of the episode, Catrina is in her arms.
- This episode marks the debut of Steve Tree.