Original airdate was December 29, 1961
This was the 15th episode of the Second Season.
Dino's x-rays are mistaken for Fred's. As a result, Wilma thinks Fred has the illness Dino has ("a dinopeptic germ" which is harmless to dinosaurs, but deadly to humans), and this causes hilarious results.
Credited animators : George Nicholas, Willam Keil.