|Dates||Before humanity - 2017 (killed by Lily Sunder)|
|Episode(s)||12.10 Lily Sunder Has Some Regrets|
Mirabel's flight is sent to Orono, Maine, to deal with the Nephilim. Under the leadership of Ishim, the angels capture the angel accused of siring a Nephilim, Akobel, and as Castiel reads out his crimes, he is stabbed and killed by Mirabel.
After the death of Benjamin, Castiel meets with Mirabel and Ishim at a diner to discuss what has happened. Telling Castiel of the other angel's death, he asks why he wasn't told, only for Mirabel to reply they didn't think he would care, before excusing herself from the table.