In the episode, Sam, Dean and Mary Winchester investigate a case where a couple were killed when they heard a baby crying in a house.
Meanwhile, Castiel (Misha Collins) reluctantly teams up with Crowley (Mark A. Sheppard) to find Lucifer (Rick Springfield) who healed the legs of Vince's sister.
Lucifer demands Rowena (Ruth Connell) make his vessel stronger, she tricks him as her spell decays the body and sends him to the bottom of the ocean.
Sean McKenna from TV Fanatic, gave a 4.3 star rating out of 5, stating: "'The Foundry' really felt like a step up, especially in focusing on Mary’s difficulties being back alive.
I am curious as to how her story will play out in the long run, but I maintain that it's been great to have her and her fresh dynamic as a part of Supernatural Season 12.
It was a nice mix of a case of the week with some deeper familial drama, and of course, you can't go wrong with the pairing of Cas and Crowley.