This episode is a pretty much a remake of Reservoir Dogs -abet shortened and less violent. But the big beats of the film are all here, i.e. The diner scene, the heist gone wrong being a central story beat that the episode is edited around, the split perspectives etc. I am not really sure why-besides desperation-that creatives decided to do this. Supernatural has made references to other works and/or did their own take on certain tropes (especially in the horror genre). Playthings from season 2 is pretty clearly indebted to Kubrick's The Shining and there's more than a bit of Deliverance in Season 1's The Benders. But no episode that I can recall up to this point* was ever so obviously a conscious remake of another work-even things like season's 4 Monster Movie are referencing *franchise* of films (universal Horror of the 30's-50's) and are wider than such a specific reference. Changing Channels contain multiple *parodies* not remakes. This is not something the show does and I see no reason to start doing so after 11. 5 years.
To make matters worse QT's style is so distinctive that it is really hard to replicate without making it seem like a cheap knock-off. And that is exactly what this episode comes across as. It is a silly, weak attempt to replicate a much better director and writer. No odd diner conversation can replicate goons discussing Like a Virgin and it is best not to try.
If the episode was a stand-alone monster of the week story I would be kinder on it failing in its intent. I could treat it like a Playthings. But the episode is actually really key to the British Men of Letters storyline and the final reveal is a good one that drives much of the final seasons of the show. But the story beats are buried behind stylistic hysterics that are distracting.
*in a later season the show also in essence remakes Kill Bill by QT as well but it was only after this episode. I like the later episode better but this doesn't belong on Supernatural.