Babylon 5 is also a useful oddball because so much of its plan versus reality was documented on USENET or in interviews as they happened. As they say "no plan survives contact with the enemy" and in this case the enemies of any 5 year TV plan are numerous, and included among other things network notes, network switches, cast contract negotiation problems, cast health problems, and more. JMS made it very clear he had to have a ton of contingencies in his five year plan and the show had to carry out a number of them.
It's also an oddball because even JMS hasn't been able to replicate it with nearly the same degree of success. B5 follow-up Crusade was pitched with a 3-5 year plan and barely survived a half season. (Supposedly B5: Legend of the Rangers was pitched as a 5 year plan including cleaning up Crusade plot-lines at least "sideways" and that barely got a pilot movie.) Sense8 was pitched to Netflix (appropriate to consider for this overall thread) as a 5 year plan and got 2 seasons and wrap-up movie (though seemingly had a lot fewer contingency problems than B5's early seasons in the 2 seasons and a movie that it did get).
It's also an oddball because even JMS hasn't been able to replicate it with nearly the same degree of success. B5 follow-up Crusade was pitched with a 3-5 year plan and barely survived a half season. (Supposedly B5: Legend of the Rangers was pitched as a 5 year plan including cleaning up Crusade plot-lines at least "sideways" and that barely got a pilot movie.) Sense8 was pitched to Netflix (appropriate to consider for this overall thread) as a 5 year plan and got 2 seasons and wrap-up movie (though seemingly had a lot fewer contingency problems than B5's early seasons in the 2 seasons and a movie that it did get).