Harold Livingston, screenwriter. It doesn’t seem like he was terribly prolific (21 writing credits in IMDB) but there’s some gold.
His biggest credit seems to be the screenplay for the first movie based on a minor SF TV show from the 1960s. Other credits include “Run For Your Life”, nine episodes of “Mission: Impossible”, “The Bold Ones: The Protectors”, “The Name of the Game”, “Banacek”, “Archer” (the 1975 “Archer”), “Barbary Coast”…
…and “Mannix”. (“The Girl from Nowhere“, season 7, episode 19. “A Small Favor for an Old Friend“, season 8, episode 7, one of the “old Army buddy” episodes.)
You didn’t mention he was also a badass which I found out about in the Variety article. I consider “founding member of the Israeli Air Force” to be, if not the pinnacle, very near the pinnacle of badassery. If not that, then ‘played a key part in ensuring Israel’s victory during the 1948 Arab-Israeli War’ is a heck of… shall we say… an… accomplishment.
I’m also now stoked for the third sequel to the alternate-timeline spinoff of a movie series based on a minor SF TV show from the 1960s.