Reportedly in real life and behind the scenes Danny Bonaduce was a bratty kid on the set and one day the rest of the cast ta!ked Susan Dey into pouring a pitcher of milk over his head to get him to behave. Then the producers or the writers of the show decided to make a plot in which Susan Dey (Lori) pours a pitcher of milk over David Cassidy's (Keith's) head.

What episode was this?