Logline
An accident while investigating a time portal sends Ensigns Beckett Mariner and Bradward Boimler through time from the 24th century, and Captain Pike and his crew must get them back where they belong before they can alter the timeline.
Written by Kathryn Lyn & Bill Wolkoff
Directed by Jonathan Frakes
TBH I think TNG did this very well with the Klingons (depending on who was writing the episode, of course). Like, some Klingons were Real Klingons™ but many others only gave lip service to those ideals and were actually as sneaky and cowardly as any other race. I think a lot of Worf’s inner conflict came from realizing and processing that fact.