Kevin Costner's Best 'Yellowstone' Quote Still Defines Taylor Sheridan's Western 7 Years Later

“There’s only devils left” — Kevin Costner’s John Dutton line in Yellowstone — remains one of Taylor Sheridan’s most enduring summaries of the series’ moral logic seven years after the show’s debut. The quote comes from Season 2’s “Only Devils Left,” where Dutton faces poisoned cattle after chemical dumping and negotiates with Malcolm Beck (Neal McDonough) and Teal (Terry Serpico) over land tied to a proposed casino. As Jamie (Wes Bentley) warns it’s like dealing with the devil, Dutton answers that angels are gone. Sheridan has said he wanted to test whether morality matters when defending power.