The episode centers on , a police trainee who witnesses a monster murder his fiancée. While Ennis’s "origin story" mirrors Sam and Dean’s—losing a loved one to a supernatural force—he lacked the immediate charisma or unique hook needed to carry a new series.
By introducing five monster families (including shapeshifters and werewolves) who run the city like a mafia syndicate, the episode traded the Winchesters' "monster of the week" mystery for a Shakespearean power struggle. This felt less like Supernatural and more like The Originals or Gossip Girl with claws. For the core audience, the sudden infusion of "pretty-people problems" and organized monster crime felt antithetical to the show's established spirit. The Protagonist Problem [S9E20] Bloodlines
However, the episode wasn't without merit. It showed the showrunners' willingness to take risks and explore the social structures of the creatures the Winchesters usually just killed. While Supernatural: Tribes never made it to air, the lessons learned from "Bloodlines" likely influenced the second (and also unsuccessful) spin-off attempt, Wayward Sisters , which stuck much closer to the gritty, family-oriented roots of the original series. The episode centers on , a police trainee
The Winchesters were relegated to supporting characters in their own show, acting as brief mentors who essentially told Ennis, "Welcome to the world, good luck." This sidelined the chemistry that made the mother-ship show successful. Without the brothers' banter and history, the Chicago cast felt like a collection of archetypes (the star-crossed lovers, the rebellious son, the cold patriarch) rather than lived-in characters. World-Building vs. Rule-Breaking This felt less like Supernatural and more like
Ultimately, "Bloodlines" failed because it tried to be everything Supernatural wasn't. It traded the road trip for a single city, the underdog hunter for a police-affiliated rookie, and the lone-wolf monster for a socialite clan.