Ep 11. Regarding Dean

In Supernatural season 12 episode 11, titled "Regarding Dean," the Winchester brothers are faced with a heartbreaking situation when Dean becomes infected with a curse that slowly erases his memories and cognitive abilities.

The episode starts with Sam and Dean investigating a case involving people who have mysteriously disappeared without a trace. As they work to unravel the case, Dean starts experiencing strange symptoms, such as forgetting basic things like where he is or what he's doing. At first, Sam assumes it's just stress, but soon realizes that something much more sinister is at work.

After a visit to a witch, the brothers discover that Dean has been cursed with a spell that causes memory loss and deteriorating mental abilities. The curse is triggered by a special playing card, which Dean unknowingly picked up during their investigation, and will continue to worsen until he becomes a vegetable-like state.

Desperate to save his brother, Sam searches for a cure, but the witch who put the curse on Dean is long gone. They find a note she left behind with a clue to a possible cure, and the brothers set out to track it down.

As Dean's condition worsens, Sam does everything in his power to keep him safe and comfortable, including locking him up in a room to prevent him from leaving and potentially endangering himself. While there, Dean experiences intense hallucinations and flashbacks to pivotal moments in his life, including his childhood and past hunts with his brother.

Meanwhile, the brothers' longtime ally and friend Bobby Singer returns to help out with the case and offer emotional support to Sam as he watches his brother slowly slipping away. Together, they continue to follow the trail of clues and eventually come across a powerful mystical object that may hold the key to saving Dean.

In the end, the brothers find a way to reverse the curse and save Dean's deteriorating mind, but not before he comes face-to-face with the devastating reality of losing his memories and his identity.

"Regarding Dean" is a heartbreaking and emotional episode that showcases the strong bond between the Winchester brothers and the lengths they'll go to keep each other safe. Through the journey, both Sam and Dean are forced to confront their deepest fears and face the possibility of life without each other.