"The Duck Who Knew Too Much" is the ninety-sixth episode of DuckTales.
Fenton wins a vacation, but in order to convince Scrooge to give him time off, he fakes an illness. But then, while on vacation, he not only finds that Scrooge is going to the same location, but also uncovers an international conspiracy to steal Scrooge's gold overseas, and tries to alert Scrooge about it without blowing his cover.
- Susan Blu as Goldfeather, Tour Guide
- Hamilton Camp as Fenton Crackshell, Truck Driver
- Miriam Flynn as Gandra Dee
- Kathleen Freeman as Mrs. Crackshell
- Alan Oppenheimer as Von Doghausen/Agent X, Game Show Host, Waiter, Receptionist
- Alan Young as Scrooge McDuck, Mail Carrier
- The title is a pun on the title of the 1934 and 1956 Hitchcock films, The Man Who Knew Too Much.
- Agent X remarks that "Oppenheimer" is a stupid code word. He himself is voiced by Alan Oppenheimer.