I.O.U. a U.F.O. is the twenty-eighth episode of season one of Quack Pack and the twenty-eighth episode overall. It first premiered on November 5, 1996. The episode was written by Cathryn Perdue and directed by Toby Shelton.
The family travels out into the desert and Dewey claims to see a U.F.O., much to the disbelief of the others. But when he gets the help from one of the locals, Dewey's curiosity soon lands him in a heap of trouble.
- Pamela Adlon as Dewey Duck (voice)
- Tony Anselmo as Donald Duck (voice)
- Elizabeth Daily as Louie Duck (voice) (as E.G Daily)
- Jeannie Elias as Huey Duck (voice)
- Kath Soucie as Daisy Duck (voice)
- The fake aliens are similar to appearance to the fix-its in the 1980s Steven Spielberg film, *batteries not included.