I've noticed that some episodes of "My Three Sons" have been reused to form other episodes:For example:From reading the description of the second season episode "Instant Hate",the plotline sounds exactly like a CBS/color/Bryant Park episode with singer-songwriter Jackie DeShannon(1965's"What the World Needs Now is Love" and 1969's "Put a Little Love In Your Heart"-both top 10 hits for her,and the ABC/Bryant Park black and white episode from the 1964-1965 season,where the boys(Mike is going out with Sally(the late Meredith MacRae )at the time,),and try to convince Bub to stay,sounds like a CBS/color Bryant Park episode with the late James Gregory as one of Uncle Charley's old sea friends trying(in vain)to convince Charley to return to the sea.Anybody know of any other recycled plotlines?

They also did episodes about misjudging people:1-In a pretty good 1962 episode from the ABC/Black and White /Bryant Park years,"The Girls Next Door",in which some stewardesses moved in next door,and all the family(Bub,Mike,Robbie and Chip)were infatuated with them,except for Steve,who thought they were just a bunch of noisy girls at first---until the very end,when he happily made peace with them,and the later CBS California episode with Sylvia Sidney as Ernie's teacher,who at first accused him of being a cheat,and lying,but,after meeting the Douglas's,changed her mind happily about Ernie.Both episodes had happy endings.Were there any other episodes of "My Three Sons"that had identical plots?

I've noticed that some episodes of "My Three Sons" have been reused to form other episodes:For example:From reading the description of the second season episode "Instant Hate",the plotline sounds exactly like a CBS/color/Bryant Park episode with singer-songwriter Jackie DeShannon(1965's"What the World Needs Now is Love" and 1969's "Put a Little Love In Your Heart"-both top 10 hits for her,and the ABC/Bryant Park black and white episode from the 1964-1965 season,where the boys(Mike is going out with Sally(the late Meredith MacRae )at the time,),and try to convince Bub to stay,sounds like a CBS/color Bryant Park episode with the late James Gregory as one of Uncle Charley's old sea friends trying(in vain)to convince Charley to return to the sea.Anybody know of any other recycled plotlines?
I guess with so many episodes on TV it's hard to come up with new ideas.