Hoah boy. 1940s-era sterotypical Tribal Africa, here we come.
TNG 1x04:
Code of Honor, or DER EHRENKODEX

Cast and crew opinions!
Tracy Torme, writer: embarrassed by what he called a "1940s tribal Africa" view of Africans
Jonathan Frakes, Riker: a "racist piece of shit"; "The worst and most embarrassing and one that even Gene would have been embarrassed by was that horrible racist episode from the first season... Code of Honor, oh my God in heaven!"
Brent Spinder, Data: "just a racist episode. Maybe not intentionally but it felt that way and looked that way. It was the third episode so it was fortuitous that we did our worst that early on and it never got quite that bad again."
Wil Wheaton, Wesley: Points out that it was the director, not the script, which made everyone african-american
Garret Wang, Kim: this episode "stinks"
LeVar Burton, LaForge: Agrees with Garret Wang.
Michael Dorn, Worf: "the worst episode of Star Trek ever filmed", with agreement from every other member of the cast in attendance.