In "All Along the Watchtower", Sam shares the intelligence Doctor Hess gave him on Lucifer with Dean and Mary. John summons Azazel in a desperate attempt to save Dean in 2.01 In My Time of Dying.He offers the demon The Colt, but Azazel wants more.John agrees to his terms, and Azazel possesses the reaper Tessa to put Dean's spirit back in his body. The group is then interrupted by Mick who explains that Toni's orders were to make contact with the Winchesters but she went too far out of her belief of their being a malfeasance in the American hunters.

Taking him to a farmhouse, Toni explains that the British Men of Letters have kept Britain safe from monsters for forty years and want to do the same with America. Together, Dean and Arthur raid a POW camp, killing several angels and liberating Charlie and several other human prisoners. With Candy's help, Sam and Dean track down Linda who tearfully reunites with Kevin.
In 1987, Doctor Hess forced Kendricks student Mick Davies to murder his best friend Timothy as a test of Mick's loyalty to the British Men of Letters code.

Afterwards, Mary gets an email from "Mick" claiming that he is to remain in London for a few more weeks. Kevin later convinces Sam and Dean to take him to see his mom who is surrounded by demons. Sam manages to evade the trap and knocks Gordon out. Rowena recognizes the curse as one belonging to a family of druidic witches with whom she has a bad history and had believed she had wiped out. In "The Girl with the Dungeons and Dragons Tattoo", it's revealed that Dick Roman took Frank's hard drive, which he gives to the IT expert Charlie to hack it. Dean is impressed by Ben's cool headed behavior during the rescue, having put Ben in charge of helping the other children out a window. In "War of the Worlds", Asmodeus seeks out Jack, using his powers to search for the boy while also interrogating those who have seen the Winchesters. However, the British operation is destroyed by a team of American hunters led by Sam and Jody before this can happen. Unable to defeat the demon, Arthur refuses to give up his friends for any price, something that Ardat recognizes. In "Byzantium," Sam calls Lily for help in hopes that she can translate Kevin Tran's notes on the angel tablet and find a way to bring back the deceased Jack. After Claire Novak is bitten, Mick advocates killing her while Sam wants to try a cure the British Men of Letters invented involving injecting the newly turned werewolf with the blood of their sire. Alastair was resistant to Ruby's knife and was even immune to pure angel-smiting. Lisa was furious and took off with Ben. Nick finally learns that Abraxas was captured by Mary Winchester while he was slaughtering a In "Prophet and Loss," Nick escapes after brutally beating up a cop and returns to his old house where he encounters the ghost of his wife Sarah. When Sam refuses to tell her, Toni has Ms. Watt torture him for the information, but he continues to refuse. In "The Rupture," after awakening in the hospital, Arthur prepares to leave to help his friends, only to have Ardat arrive. However, the demon turns out to have been hired by Anael along with two others to assassinate the Winchesters. He also forms a wall between Sam's active consciousness and the debilitating memories of his time in Lucifer's cage. The Alpha Vampire returns in "The Raid" when the British Men of Letters begin systematically wiping out all of the vampires in America. Samhain is the only so far known Whitish Eyed Demon and presumably the only one ever.