Seeking a break from seemingly fruitless research, the Winchesters attend the funeral of a wrestler their father idolised, and soon find themselves drawn into a new case.
At a tribute match that evening another death occurs and the brothers discover that there has been a similar occurrence at every stop made by this travelling troupe of wrestlers.
Meanwhile, in Hell, Lucifer is getting his troops to search for other "hand of god" artefacts. While this is going on, a demon called Simmons (Bethany Brown) helps Crowley slip his leash and escape. However, we've all seen Game Of Thrones and have a pretty good idea of how that's going to end.
Beyond The Mat was rather an erratic episode, with the antagonist of the main plotline having a pretty ill-defined plan and the secondary plot (Crowley's adventures) being the more interesting part of the episode, even though it was (to a large degree) quite predictable.
As well as facilitating Crowley's escape back into the world, the main point of his storyline was to reinforce the major limitation of the "hand of god" artefacts, rather suggesting that - ultimately - one of these will be playing a role in the Winchesters' inevitable final triumph over Amara.
While there was a solid theme of "good people making bad decisions" to the central story, it really didn't sell itself convincingly. I think it was designed, as much as anything, to reinforce the "change in management" in Hell, but that kind of got lost in a rather jumbled story.
On the other hand, it was great to see the Winchesters really enjoying themselves, at least for a while, doing something not directly related to their family business, but instead reliving some of the - rare - good times from their childhood (that is, going to wrestling matches with their dad).