[s12e4] Goodbye Fergus -

Sam helps Magda realize she isn't evil. However, after she is sent away for her safety, she is assassinated by Mr. Ketch of the British Men of Letters.

In this episode, Sam and Dean investigate a series of mysterious deaths involving in Iowa. [S12E4] Goodbye Fergus

The fourth episode of Supernatural Season 12 is actually titled . Sam helps Magda realize she isn't evil