I've been reading the Marc Cushman These are the Voyages guide to season 3 (I know, controversial here) through my TOS rewatch, and he mentions that NBC had the option to order either 24 or 26 episodes, and only officially canceled the order for the last two while "Turnabout Intruder" was in filming.
The 25th episode was to be "The Joy Machine", Meyer Dolinsky's rewrite of Theodore Sturgeon's original script (which was novelized in the 1990's).
The 26th would have been either John Meredyth Lucas' "The Godhead" or Darlene Hartman's held over from season 2's "Shol"... although Cushman is much more vague about this slot at the end of the book, only that Shatner would have directed.
Considering these slots should have been in pre-production (especially "The Joy Machine" needing to be ready to shoot in 6 days when the cancellation order came in), has anything else come to light about what could have been? Casting, set designs, later draft scripts? Well, aside from the old "Requiem for a Martian" meme anyway.
The 25th episode was to be "The Joy Machine", Meyer Dolinsky's rewrite of Theodore Sturgeon's original script (which was novelized in the 1990's).
The 26th would have been either John Meredyth Lucas' "The Godhead" or Darlene Hartman's held over from season 2's "Shol"... although Cushman is much more vague about this slot at the end of the book, only that Shatner would have directed.
Considering these slots should have been in pre-production (especially "The Joy Machine" needing to be ready to shoot in 6 days when the cancellation order came in), has anything else come to light about what could have been? Casting, set designs, later draft scripts? Well, aside from the old "Requiem for a Martian" meme anyway.