Speaking of werewolves...the Winchesters take a break from their post-Demon-Dean rest 'n' recuperation to investigate a series of apparent werewolf attacks in Washington State.
They're rather surprised when their legwork leads them to Kate (Brit Sheridan), from Season Eight's Bitten.
However, after the confront her, they discover the attacker is actually her younger sister, Tasha (Emily Tennant), who Kate has been trying to protect.
Tasha had been in a major car accident and to save her life Kate had turned her into a werewolf as well.
Unfortunately, Tasha hasn't been as zen about the new status quo as Kate and has been giving in to her primal urges.
Dean then tricks Kate into leading him and Sam to a cabin in the woods where Tasha is hiding out.
After the underwhelming and drawn-out first three episodes of this season, it was nice to see Sam and Dean getting back to an old school, monster-of-the-week tale in Paper Moon.
Unfortunately, despite a third act twist and some in-your-face parallels between the werewolf sisters and the Winchesters, this was still quite a pedestrian episode.
Pacing has been a major issue with Season Ten so far. The opening three episodes could easily have been condensed into two and Paper Moon felt similarly drawn out, with a major exposition sequence in the middle as Kate explained what had befallen her sister.
I always welcome the return of old characters to the show as I think it reinforces the verisimilitude of the Supernatural 'Verse, but - despite finding out what Kate has been up to since we last saw her - Paper Moon came off as nothing new.
Once you got past the dynamic of Kate and her sister, this episode didn't really show us anything particularly inspired.