Ranked #3 of 37 in Season 4•+0.5 vs season avg
Steve gives Mike advice on love after he announces his passion for his new girlfriend Darlene, who Mike wants to devote time to, so he hardly welcomes Steve's suggestion that he help find a date for the girl in his office.
Fred MacMurray
Steve Douglas
Don Grady
Robbie Douglas
Tim Considine
Mike Douglas
Stanley Livingston
Chip Douglas
William Frawley
Bub O'Casey
Gene Reynolds
Director
Joanna Lee
Writer
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"How Do You Know?" is episode 6 of My Three Sons season 4. It scored 7.7/10 from 72 votes, ranking #3 of 37 episodes this season (season average 7.2). Directed by Gene Reynolds and written by Joanna Lee, it aired on October 24, 1963.