My Three Sons Season 7 Episode 27
Other fathers help their sons in a school science fair, but Steve tells Ernie he’s on his own. Soon his project turns to disaster when his very crudely built electric clock absolutely refuses to run. After vainly pleading that most of his classmates are getting parental help, on the day of the fair, Ernie must be forced to go to school.
Serie: My Three Sons
Episode Title: Ernie's Folly
Air Date: 1967-03-30