Strange New Worlds having just premiered on July 17, work on the next voyage is already nearing the finish line. A recent production update reveals that Season 4 is almost done filming—and while it won’t beam onto screens anytime soon,

Goldsman brings up the classic TOS episode “The City on the Edge of Forever” as the ultimate example of not only a great episode of Trek but also how it’s demonstrative of the limits of the classic series. We got to know the TOS cast fairly well from 1966 to 1969, but it’s not like the characters had complete arcs.