Yellowstone season 1, episode 4, “The Long Black Train” throttles back on the story momentum for an episode as characters’ relationships are built up in expectation of what will come next in the season. The first season of Yellowstone may not be everyone’s favorite, but it’s critical to developing the characters who have only just been introduced. Episode 4 puts an emphasis on slowing things down and exploring just who the Duttons, their friends, and their enemies are. The previous episode, “No Good Horse”, was filled with backstory and violence, making this episode a reset.

https://screenrant.com/yellowstone-season-1-episode-4-recap/