Blue Bloods season 12, episode 10, "Old Friends," features the return of Lyle Lovett as Texas Ranger Major Waylon Gates, who assists Danny in intercepting a drug shipment. The episode, directed by Jackeline Tejada and written by Ian Biederman, also explores conflicts between Frank Reagan and Mayor Chase, along with a misconduct investigation led by Jamie. For a detailed summary of this episode, visit Blue Bloods Wiki . Old Friends | Blue Bloods Wiki | Fandom