The Rupture

• Is Rowena truly dead? Is her assertion that her body will eventually be consumed by the souls she ingested accurate?
• Lilith's Crook was simultaneously discovered and destroyed in the same episode, but could there be other super-weapons in hell?
• If Cas' power has been failing lately, how could he smite Belphegor so completely? Why are Cas' powers reduced?
• What did Rowena mean when she said that Sam was the "closest thing we have to a seasoned witch" when performing the spell? Was it because he could read the incantation? Or some other reason?
• Is Mr. Ketch truly dead? Or does he have another resurrection sachet to restore him?
• How long will it take for Castiel and Dean to reconcile? How bad will things get in the mean time?
• When will we learn the full consequences of Sam's wound from the Equalizer?

• Cas's power has been failing for some time and he does not know why.
• Supposedly self-centered Rowena actually is capable of caring for others or a cause larger than herself, though she claimed she still was too selfish to be able to be the one to kill herself.
• Lilith forged the Crook to call demons into hell after she’d sent them to our world. She kept the Crook in a box etched with Enochian writing, knowing that demons can’t read the incantation (which is a song of praise to Lucifer), which serves as a key to open the box.
• Belphegor has wanted to rule hell for a long time. He manipulated Cas and the Winchesters to gain access to Lilith’s Crook. If his plan had worked, the billions of souls he ingests would make him more powerful than Lilith or any other demon. He says he’d be a god.
• When Castiel told Belphegor that the Winchesters were just using him and they didn’t care about him, it seemed like Cas was talking about himself.

• The name on the outside of the crypt where Rowena was working her final spell was "Carver", referring to long-time writer, producer, and show runner Jeremy Carver.
• The name of the cemetery was Higley Memorial
• After Rowena’s first spell failed, Belphegor (a demon) was able to move an iron barricade and exit the crypt. A demon shouldn’t be able to do that without incident.
• When Mr. Ketch woke up, the nurse told him they “took the bullets out”, but didn’t Ketch get shot with rock salt or iron dust? So there wouldn’t be actual bullets to remove.
• Sharon Taylor, who plays Ardat, previously played a crossroad demon that Bobby tortured in Weekend at Bobby's.
• Taking in souls as fuel has been used in the past such as when Cas consumed souls to increase his power in The Man Who Knew Too Much, and when Rowena turned Dean into a walking bomb in Alpha And Omega.

• The name "Carver" on the outside of the crypt where Rowena was working her spell could refer to long-time writer, producer, and past showrunner Jeremy Carver or Chuck's pen name Carver Edlund (which is also a reference to past Supernatural writer Ben Edlund).
• Rowena's swan dive into hell was somewhat similar to the way Sam fell into hell in the season 5 episode Swan Song.
• In the hospital, Arthur Ketch uses the alias "Mr. Blackmore"; a reference to Elizabeith Blackmore, the actress who played British Woman of Letters Lady Toni Bevell
• Rowena's last words to Dean and Sam, "Goodbye, boys" echo her son Crowley's last words to them, "Bye, boys".
• In ancient Sumerian mythology, Ardat is a succubus who preys on men. She is also a servant of Lilith.
• Rowena said that if her planned worked, they'd all be "home in time for high tea", which is normally between 5 and 7 PM
• Rowena said that trying to create another trapping crystal for the souls would be like “tossing mouse traps at the Great Plague”. The Great Plague was a bubonic plague epidemic that ravaged England from 1665 - 1666. It should not be confused with The Black Death, which swept across Europe and much of the Eurasian continent in the 1300s. Because bubonic plague is transmitted by fleas that feed on rodents and then on humans, trapping and killing rodents may have been helpful, unless there were too many rodents to eliminate using that method
• When the group is discussing Lilith's Crook, it is compared to "Little Bo Peep" calling her sheep to her. Little Bo Peep is a popular Mother Goose nursery rhyme that likely originated in the 1800s. In the popular version of the rhyme, Little Bo Peep does not use a Crook to call her sheep to her. The rhyme goes "...Leave them alone and they'll come home, wagging their tails behind them." However, in the original rhyme, Little Bo Peep does use a crook to find her sheep, but the ending is not as happy: "...Then up she took her little crook, determined for to find them. She found them indeed, but it made her heart bleed, for they'd left their tails behind them."
• When Rowena receives the owl's skull she needs for her spell, Dean says "R.I.P, Hedwig." Hedwig is a fictional owl character from the popular Harry Potter books and film franchise.

• None

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S15 E4 Atomic Monsters