Recent events have prompted Castiel to check up on the family of his "vessel", Jimmy Novak, only to discover that his daughter Claire Novak (Kathryn Love Newton, last seen in season four's The Rapture) has turned into a bit of a juvenile delinquent.
Although she knows that Castiel is an angel, she blames him for 'killing' her father, which lead to her mother abandoning her. Claire has now hooked up with a slimy con man, Randy (Roark Critchlow), who she steals for, to help him pay off his debts to a local loan-shark.
When she steals Castiel's wallet and does a bunk, the angel turns to Sam and Dean for help.
Dean is still being plagued by blood-soaked dreams of slaughter as the Mark of Cain works its evil on him, and he asks Castiel to be ready to "end him" if he turns to the "dark side".
Unfortunately, Randy's debts far exceed his ability to pay, and he ends up trading Claire to the loan-shark to settle his account.
That's when Castiel and the Winchesters arrive.
The Things We Left Behind was a strange episode of Supernatural, largely bereft of anything 'supernatural' - except for the scenes between Crowley and his annoying mother, Rowena the manipulative witch, and Castiel's use of his powers.
It's only really the brutal climax that salvages the episode from being simply an hour of family drama.
While it is interesting to see the Winchesters caught up in a problem that isn't related to monsters or demons, every strand of The Things We Left Behind could also have worked just as well as a sub-plot in a more traditional episode.
What makes this all even stranger as a direction to go is that when originally broadcast in the States this was the last episode before the show's winter hiatus.
Sure, it poses a big question about Dean's future, but otherwise it's quite an atypical story that doesn't really represent all that's great about the Supernatural brand.
However, of particular interest to HeroPress readers is the fact that the loan shark, Salinger, is played by Thomas Newman, director of stoner/zombie flick Bong Of The Dead, who I interviewed back in 2011.