Ep 17. Mother's Little Helper

In Supernatural season 9 episode 17, titled "Mother's Little Helper," Sam and Dean investigate a case involving a series of mysterious deaths connected to a large corporation that produces an energy drink. While investigating, the brothers discover that the people behind the deaths have been using a spell to control the minds of those who consume the energy drink, turning them into killing machines.

As the brothers delve deeper into the case, they learn that the spell is being cast by a group of powerful witches, led by a woman named Rowena, who also happens to be Crowley's mother. The powerful witch has been using her magic to manipulate the minds of those around her for years, and her latest scheme involves using the energy drink to turn people into her mindless minions.

Meanwhile, Castiel struggles with dealing with his human body and all of the painful emotions that come with it. He seeks out help from an angel, but their methods prove to be harmful, and Castiel's desperation leads him to make a deal that could have disastrous consequences for both him and the Winchesters.

Throughout the episode, the brothers must battle the witches and find a way to stop their mind control spell before it's too late. At the same time, they also have to deal with the ongoing fallout from their recent disagreements, including the fact that Dean is still keeping secrets from Sam.

As always, the episode is packed with action, humor, and plenty of surprises, making it a thrilling addition to this beloved show's ninth season.