Overview
Prof. Ludwig Von Drake shares his knowledge on the subject of child psychology. He is particularly studying Donald Duck (whom Von Drake refers to as "Mr. X" to protect his identity) and offers advice on how to handle Huey, Dewey and Louie.
| Actor | Age then | Age now | |
|---|---|---|---|
 | 60 | December 15, 1966 (65) | |
 | 41 | November 2, 1986 (66) | |
 | 57 | February 20, 1985 (80) |