The British Invasion is the 17th episode of Season 12. It aired on April 6, 2017.


Dean Purgatory Blade.png There was something about being there... It felt pure.

This episode summary is an official CW press release. It may contain errors.

Sam and Dean get a lead on Kelly Kline's (guest star Courtney Ford) whereabouts. Mick (guest star Adam Fergus) drops by the bunker unexpectedly and decides to join the hunt.




Main CastEdit

Recurring CastEdit

Guest StarsEdit


Featured Supernatural BeingsEdit



  • The episode had 1.57 million viewers and got a 0.5 rating.
  • The title is a reference to the phenomenon that occurred in the mid-1960s when rock and pop music acts from the United Kingdom, as well as other aspects of British culture, became popular in the United States, and significant to the rising "counterculture" on both sides of the Atlantic.
  • Much like John during Mary's death, Mary has developed a romantic relationship with someone else, specifically with Arthur Ketch. This makes it the first time she had a sexual encounter with anyone in almost three decades.
  • Sam is shown to have a better understanding of sign language.
  • Arthur Ketch revealed that he and Mick went to Kendricks Academy together.
  • Mick revealed that the key to the bunker can unlock every chapter house in the world.
  • Gillian Barber, who plays Doctor Hess, previously played Mrs. Rourke in Faith.
  • This is one of the few episodes where a creature capable of teleportation is actually shown doing it on screen, rather than during a shot change.


  • Lucifer calls Michael his "little bro". It has previously been established throughout Season 5 that Michael is the older of the two. This same error was made in Hell's Angel, an episode also written by the same writers.
  • Mick previously stated that he had not killed anyone before prior to Hayden Foster, but that is contradicted in this episode, as his first kill is shown to be Timothy, his best friend, from Kendricks Academy.


The code is what makes a young boy kill his best friend.
You only have to do what you know is right. You only have to answer to your own code.
You think I wanted this to happen? He used me... but I love this child.
Well, that was unexpected. But invigorating. I must say, when I first met you I didn't see this coming. My thought at the time was, 'I'll end up shooting this one.' Life is full of surprises.


Behind the ScenesEdit


Supernatural 12x17 Promo "The British Invasion" (HD) Season 12 Episode 17 Promo

Supernatural 12x17 Promo "The British Invasion" (HD) Season 12 Episode 17 Promo