Ranked #1 of 39 in Season 3•+1.2 vs season avg
Robbie's science master announces a special achievement award for being a straight 'A' student and to his embarassment, Robbie wins it. This causes more trouble than he could have imagined but Steve does his best to assure Robbie that he did deserve the award.
Fred MacMurray
Steve Douglas
Don Grady
Robbie Douglas
Tim Considine
Mike Douglas
Stanley Livingston
Chip Douglas
William Frawley
Bub O'Casey
Gene Reynolds
Director
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"Robbie Wins His Letter" is episode 25 of My Three Sons season 3. It scored 8.1/10 from 89 votes, ranking #1 of 39 episodes this season (season average 6.9). Directed by Gene Reynolds, it aired on March 7, 1963.