Ranked #14 of 24 in Season 12•−0.2 vs season avg
Steve's look-alike Scottish nobleman cousin Fergus, comes to America looking for a bride to take back to his hometown of Sithian Bridge and moves in on the entire Douglas family, much to the dismay of Uncle Charley.
Fred MacMurray
Steve Douglas
Don Grady
Robbie Douglas
Stanley Livingston
Chip Douglas
Barry Livingston
Ernie Thompson
William Demarest
Charley O'Casey
Beverly Garland
Barbara
Tina Cole
Katie
Dawn Lyn
Dodie Harper Douglas
George Tibbles
Writer
Earl Bellamy
Director
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"The Advent of Fergus" is episode 1 of My Three Sons season 12. It scored 6.5/10 from 94 votes, ranking #14 of 24 episodes this season (season average 6.7). Directed by Earl Bellamy and written by George Tibbles, it aired on September 13, 1971.