My Three Sons (1960)
S4E4 Dear Robbie
Episode Overview
Robbie is picked to pen an 'advice to the lovelorn' column for the school newspaper, but things get complicated when Steve finds himself entangled in the situation after a puzzling love letter shows up. Robbie proposes that the letter's author should run away with her boyfriend, while Steve takes it upon himself to dissuade her from that impulsive decision.